Potanina v Potanin (No4) (Anti-Anti-Suit Injunction) [2026] EWFC 218

[2026] EWFC 218Case No FD18F00074
IN THE FAMILY COURT
Venue SITTING AT THE ROYAL COURTS OF JUSTICE, Royal Courts of Justice, Strand, London, WC2A 2LLDate 12/08/2026MR JUSTICE MACDONALD
Natalia Nikolaevna PotaninaApplicantVladimir Olegovich PotaninRespondent
Mr Andrew Legg and Ms Jennifer Palmer (instructed by Hughes Fowler Carruthers) for ApplicantMr Paul Lowenstein KC and Mr Stephen Du (instructed by Payne Hicks Beach) for RespondentHearing Hearing dates: 1 July 2026
Approved JudgmentThis judgment was handed down remotely at 10.30am on 12 August 2026 by circulation to the parties or their representatives by e-mail and by release to the National Archives..............................MR JUSTICE MACDONALDThis judgment was delivered in private. The judge has given leave for this version of the judgment to be published.
[1]I am again concerned with financial remedy proceedings between Natalia Nikolaevna Potanina (hereafter, by convention, “the wife”) and Vladimir Olegovich Potanin (hereafter, by convention, “the husband”). The wife was granted unconditional leave to proceed with her application under Part III of the Matrimonial and Family Proceedings Act 1984 (hereafter, “the 1984 Act”) by the Court of Appeal on 4 September 2025. On this occasion, the wife is represented by Mr Andrew Legg of counsel and Ms Jennifer Palmer of counsel. The husband is represented by Mr Paul Lowenstein of King’s Counsel and Mr Stephen Du of counsel.[2]The matter comes before the court for the return date of the wife’s application for an anti-anti-suit injunction, an anti-enforcement injunction and an anti-reliance injunction, following a without notice hearing before Lieven J on 2 June 2026. On that date, Lieven J granted the wife each of the orders sought. The wife makes her application for injunctive relief in response to an anti-suit injunction obtained by the husband in the Moscow Arbitrazh Court on 18 May 2026.[3]In determining this application, I have had the benefit of comprehensive written and oral submissions from leading and junior counsel and a court bundle and an agreed bundle of authorities. The court also has before it expert reports on Russian law on behalf of the wife, from Mr Maxim Kulkov, and on behalf of the husband, from Ms Olesya Petrol. At the outset of the hearing, on the application of the husband, I excluded from consideration a letter from a Russian lawyer, Dmitry Evgenievich Lovyrev, that had been included in the bundle by the wife. That letter purported to provide opinion evidence on Russian law. No Part 25 application had been made by the wife for permission to adduce such opinion evidence. Whilst Mr Legg and Ms Palmer invited me to consider the material de bene esse and to give it such weight as I saw fit in making my decision, to adopt that course in relation to opinion evidence would be to ride a coach and horses through the requirements of Part 25 of the FPR 2010. In the circumstances, I make clear I have not considered the material from Mr Lovyrev.[4]In light of the complexity of the legal issues raised at the hearing, which the husband submits are entirely novel in the context of family proceedings, I reserved judgment at the conclusion of the hearing. I now set out my decision and my reasons for it.

BACKGROUND

[5]On 8 October 2018, the wife issued an application under Part III of the 1984 Act for financial remedies following an overseas divorce. The wife advances both a sharing claim and a needs claim before the court, the latter pursuant to the jurisdiction under Council Regulation (EC) No 4/2009 of 18 December 2008 on jurisdiction, applicable law, recognition and enforcement of decisions and co-operation in matters relating to maintenance obligations (hereafter the “Maintenance Regulation”), which was in force at the relevant time but repealed after the United Kingdom left the European Union by Schedule 1(1) paragraph 13(3)(b) and (c) of the Jurisdiction (EU Exit) Regulations.[6]The extensive procedural history of the wife’s application under the 1984 Act is set out in the first instance decision of Cohen J refusing permission (Potanin v Potanina [2019] EWHC 2956 (Fam), [2020] Fam 189), the decision of the Court of Appeal overturning the decision of Cohen J (Potanin v Potanina [2021] EWCA Civ 702, [2022] Fam 23), the decision of the Supreme Court overturning the decision of the Court of Appeal (Potanina v Potanin [2024] UKSC 3, [2024] AC 1063) and finally, the Supreme Court having remitted the matter to the Court of Appeal, the decision of the Court of Appeal overturning the decision of Cohen J and granting the wife leave to bring an application under the 1984 Act (Potanina v Potanin [2025] EWCA Civ 1136, [2026] Fam 11).[7]Thus, after nearly 8 years of litigation, the wife was permitted by the Court of Appeal to proceed with her application. The husband applied to the Supreme Court for permission to appeal against the decision of the Court of Appeal but permission to appeal was refused on 17 December 2025.[8]The matter came before this court on 24 February 2026 for case management towards final hearing. On that date, the husband applied to adjourn the proceedings generally, pending determination of proceedings for an anti-suit injunction commenced by him in the Arbitrazh Court of the City of Moscow. The background to that application requires further elucidation.[9]On 29 June 2022, the husband became a designated person under the Russia (Sanctions) (EU Exit) Regulations 2019 (hereafter “the 2019 Regulations”), which implement the Sanctions and Money Laundering Act 2018 (hereafter “the 2018 Act”). In addition to being sanctioned by the United Kingdom, the husband has also been sanctioned by Australia, Canada, New Zealand, Ukraine and the United States of America. The wife has not been designated under the 2019 Regulations and has not been sanctioned in any other jurisdiction.[10]The husband asserts that a consequence of his having been sanctioned is that the Russian commercial court has exclusive jurisdiction over the dispute in this case, pursuant to Art 248 of the Russian Commercial (Arbitrazh) Procedure Code (as amended by Federal Law No.171-FZ from 19 June 2020). The expert reports contain the following translations of Arts248.1 and248.2 of the Russian Code:
“Article 248.1. Exclusive competence of commercial courts in the Russian Federation in disputes involving persons in respect of whom restrictive measures have been introduced 1. Unless otherwise established by an international treaty of the Russian Federation or an agreement of the parties, under which the consideration of disputes with their participation is referred to the competence of foreign courts or international commercial arbitration tribunals located outside the territory of the Russian Federation, the exclusive competence of Commercial courts in the Russian Federation shall include cases: 1) on disputes involving persons in respect of whom restrictive measures are applied by a foreign state, state association and (or) union and (or) state (interstate) agency of a foreign state or state association and (or) union; 2) on disputes of one Russian or foreign entity with another Russian or foreign entity, if the grounds for such disputes are restrictive measures imposed by a foreign state, state association and/or union and/or state (interstate) agency of a foreign state or state association and/or union against citizens of the Russian Federation and Russian legal entities. 2. For the purposes of this Chapter, persons in respect of whom restrictive measures are applied by a foreign state, a state association and/or union and/or a state (interstate) agency of a foreign state or a state association and/or union shall include: 1) citizens of the Russian Federation, Russian legal entities in respect of which restrictive measures are applied by a foreign state, state association and (or) union and (or) state (interstate) institution of a foreign state or state association and (or) union; 2) foreign legal entities in respect of which restrictive measures of a restrictive nature are applied by a foreign state, a state association and/or a union and/or a state (interstate) agency of a foreign state or a state association and/or a union and/or a state (interstate) agency of a foreign state or a state association and/or a union and the grounds for application of such measures are restrictive measures introduced by a foreign state, a state association and/or a union and/or a state (interstate) agency of a foreign state or a state association and/or a union and/or a state (interstate) agency of a foreign state or a state association and/or a union. 3. The persons referred to in paragraph 2 of this Article shall have the right to: 1) apply for dispute resolution to the Commercial court of a constituent entity of the Russian Federation at their location or place of residence, provided that there is no dispute between the same persons, about the same subject matter and on the same grounds in the proceedings of a foreign court or international commercial arbitration located outside the territory of the Russian Federation; 2) apply in accordance with the procedure provided for by Article 248.2 of this Code for a prohibition to initiate or continue proceedings in a foreign court or international commercial arbitration located outside the territory of the Russian Federation. 4. The provisions of this Article shall also apply if the agreement of the parties, in accordance with which the consideration of disputes with their participation is referred to the competence of a foreign court and international commercial arbitration located outside the territory of the Russian Federation, is unenforceable due to the application of restrictive measures by a foreign state, state association and (or) union and (or) state (interstate) institution of a foreign state in respect of one of the persons involved in the dispute. 5. The provisions of this Article shall not prevent the recognition and enforcement of a foreign court judgement or a foreign arbitral award made at the suit of a person specified in Part 2 of this Article, or if that person has not objected to the consideration of the dispute with its participation by a foreign court, international commercial arbitration located outside the territory of the Russian Federation, including not applying for a prohibition to initiate or continue the proceedings in a foreign court, international commercial arbitration located outside the territory of the Russian Federation, or if that person has not objected to the consideration of the dispute by a foreign court, international commercial arbitration located outside the territory of the Russian Federation, including not applying for a prohibition to initiate or continue the proceedings in a foreign court, international commercial arbitration located outside the territory of the Russian Federation. ... Article 248.2 Prohibition to initiate or continue proceedings in disputes involving persons in respect of whom restrictive measures have been imposed 1. A person in respect of whom proceedings have been initiated in a foreign court or international commercial arbitration located outside the territory of the Russian Federation on disputes specified in Article 248.1 of this Code, or in the presence of evidence that such proceedings will be initiated, shall have the right to apply to the Commercial court of a constituent entity of the Russian Federation at its location or place of residence with an application for a prohibition to initiate or continue such proceedings in a foreign court or international commercial arbitration court. ... 5. The application provided for by paragraph 1 of this Article shall be considered by the judge alone according to the rules of consideration of the case by the Commercial court of first instance provided for by this Code, taking into account the peculiarities established by this Article. 6. The commercial court shall notify the persons participating in the case about the time and place of the court hearing in the manner prescribed by the present Code. Non-appearance of the said persons duly notified of the time and place of the court hearing shall not be an obstacle for consideration of the application provided for by paragraph 1 of this Article. ... 10. On the basis of the principles of fairness, proportionality and inadmissibility of deriving benefit from illegal or bad faith conduct, the commercial court, at the request of the applicant, shall be entitled to award in his favour a sum of money to be recovered from the person against whom an injunction has been issued to initiate or continue proceedings in a foreign court, international commercial, located outside the territory of the Russian Federation, in the event of his failure to execute a judicial act. The amount of the sum of money to be recovered by the commercial court shall not exceed the amount of the claims, brought in a foreign court, international commercial arbitration located outside the territory of the Russian Federation, and the court expenses incurred by the party to the dispute. ...”
[11]Although sanctioned since 29 June 2022, the husband issued his application in the Arbitrazh Court on 18 February 2026. As I shall come to, the wife relies on the timing of that application to suggest that the husband is seeking cynically to derail her claim having failed in this jurisdiction to prevent it moving forward. On 26 February 2026 the Arbitrazh Court granted an application by the husband for the matter to be conducted in closed court but refused his application for an interim anti-suit injunction. A further application by the husband for interim relief, made on 6 March 2026, was refused on 10 March 2026. On 26 March 2026 the court adjourned the merits hearing to 4 May 2026. That merits hearing was further adjourned to 18 May 2026.[12]It is common ground between the parties that the proceedings in the Arbitrazh Court proceeded on notice to the wife. The wife was represented in those proceedings by her Russian lawyers, who attended four inter partes hearings on her behalf, and fully contested the same. During the course of the proceedings before the Arbitrazh Court the wife applied to discontinue the proceedings on the grounds that the Arbitrazh Court lacked jurisdiction under Art 248.2. That application was refused. In the Position Statement lodged by the wife dated 23 February 2026, prepared for the case management hearing on 24 February 2026, the wife had indicated that, whilst she had not yet made an application for anti-anti-suit, she reserved the right to seek such relief from the English Court. However, the wife made no application in this jurisdiction for anti-anti-suit relief during the course of the Russian anti-suit proceedings.[13]At the merits hearing on 18 May 2026, the Arbitrazh Court affirmed the Russian court’s exclusive jurisdiction pursuant to Art 248.1 and granted an anti-suit injunction in favour of the husband pursuant to Article 248.2. By the terms of Art 248.2, the injunction took immediate effect upon pronouncement. The order is final, although it was appealable to the Arbitrazh Court of Appeal within one month of the order being granted. The wife has now appealed. In summary, the Russian anti-suit injunction: i) Prohibits the wife, personally or through her representatives, from supporting, in whole or in part, the claims made against the husband in these proceedings. ii) Prohibits the wife, personally or through her representatives, from applying in these proceedings for any interim or final anti-suit injunction, anti-enforcement injunction or other orders granting interim measures against the husband, in particular those aimed at prohibiting or restricting the enforcement of the ruling of the Arbitrazh Court. iii) Obliges the wife to take all necessary steps to ensure the complete and final termination of these proceedings within 15 calendar days of 18 May 2026.[14]The court has a translation of the ruling by Judge A. A. Fedotochkin delivered on 18 May 2026. The Russian court declared that it has exclusive jurisdiction over matters concerning the husband as a sanctioned individual. The court further concluded that the husband would not receive a fair trial in, and would not be able to participate fairly in, the proceedings in this jurisdiction. The conclusions of the Arbitrazh Court on the question of fair trial rest, primarily, on the proposition that the fact of sanctions means, a fortiori, a person sanctioned will be unable to obtain a fair hearing in the sanctioning country.[15]With respect to the proposition that sanctions must mean that the husband will be unable to obtain a fair hearing in this jurisdiction, the Arbitrazh Court held as follows:
“Based on a systematic interpretation of the aforementioned provisions and taking into account the objectives pursued by the legislature in their adoption, the mere fact of the imposition of a restrictive measure against a Russian person involved in a dispute before a foreign court or international commercial arbitration tribunal situated outside the territory of the Russian Federation is deemed sufficient to conclude that such a person’s access to justice in the foreign state applying the restrictive measures is restricted. The imposition by foreign states of restrictive measures (bans and personal sanctions) against citizens of the Russian Federation and Russian legal entities, motivated by political considerations, inevitably raises doubts as to whether the relevant dispute will be heard in the territory of the foreign state in compliance with the guarantees of a fair trial, including those relating to the impartiality of the court, which constitutes one of the elements of access to justice.”
[16]With respect to specific features of the proceedings in this jurisdiction, the Arbitrazh Court observed as follows:
“As a general rule, the personal attendance of the parties at court hearings in family cases in the UK is mandatory. However, Vladimir Olegovich Potanin is unable to participate in person in court hearings, as sanctions prohibit him from entering the United Kingdom. Natalia Nikolaevna Potanina is not subject to UK sanctions. No licences are required to pay for legal services, nor is it necessary to comply with the restrictions imposed by such licences. Natalia Nikolaevna Potanina is free to participate in person in the legal proceedings in the United Kingdom. Consequently, in the High Court proceedings between Natalia Nikolaevna Potanina and Vladimir Olegovich Potanin, the parties are in a manifestly unequal position. Based on the evidence presented in the case, the court considers that the circumstances set out directly impede Vladimir Olegovich Potanin’s access to justice in the United Kingdom.”
[17]In the husband’s written submissions to the Arbitrazh Court, it was said that the wife had conceded in the Russian proceedings that “as a general rule, personal attendance is mandatory in family proceedings before English courts”. The wife did not seek to gainsay that assertion before this court. The husband’s written submissions cited FPR 2010 r.27.3. That provision of the domestic rules provides that, unless the court directs otherwise, a party shall attend a hearing. In addition, the written submissions referred to the decision of the Upper Tribunal in Potanin v Charity Commission for England & Wales and its decision not to permit the husband to give evidence by way of video link.[18]The court has expert evidence from each party with respect to the law in Russia, in so far as it is relevant to the wife’s application. In circumstances where the issue before this court is whether an anti-anti-suit injunction should be granted having regard to the applicable principles of domestic law, the value of that expert evidence is limited. Further, whilst there are some matters on which the experts in Russian law differ, for example whether the Arbitrazh Court is required to carry out a detailed analysis of whether sanctions affect a specific individual’s ability to participate in litigation in a particular case, this court is not reviewing the merits of the Russian decision. In the circumstances, I draw the following, limited, factual conclusions from the expert evidence on Russian law: i) Art 248 of the Russian Arbitrazh Code confers exclusive jurisdiction on the Russian court to determine certain classes of dispute involving persons domiciled in the Russian Federation who are the subject of international sanctions. ii) Art 248 of the Russian Arbitrazh Code confers power on the Russian court to grant anti-suit injunctive relief to restrain proceedings in foreign courts and tribunals brought in the context of the exclusive jurisdiction conferred on the Russian court. iii) Article 248 requires two elements to be shown. Namely, the composition of the parties or the subject matter of the dispute and the absence of an agreement on the competent forum. iv) By the terms of Art 248.2, the Arbitrazh Court cannot impose a monetary penalty on the wife for breach of the anti-suit application if the husband does not make an application, i.e. the Arbitrazh Court could not act of its own motion. v) Russian courts do not invariably refuse to give effect to steps taken by parties in Russian proceedings to withdraw or discontinue proceedings following the grant of a foreign anti-suit injunction, with Russian decisions going both ways. vi) Where the dispute between the parties falls under the exclusive jurisdiction of the Russian court, this is an independent and specific statutory ground for refusing recognition and enforcement of a foreign judgment. vii) Where a Russian anti-suit injunction has been granted, there is a strong basis for concluding that recognition and enforcement of a subsequent foreign judgment will be refused on the ground that the dispute falls within the exclusive jurisdiction of the Russian court unless a sanctioned party has not objected to the jurisdiction of the foreign court and otherwise participated in the foreign proceedings. viii) Where a foreign judgment has been obtained in breach of a Russian anti-suit injunction, there is a substantial likelihood that a Russian court will also regard recognition and enforcement of that judgment as contrary to Russian public policy.[19]The expert reports deal also with the question of penalties for the breach of a Russian ASI. I am satisfied that non-compliance by the wife with the Russian anti-suit injunction may result in the grant of astreinte (a penalty sum for non-compliance with the order) up to the total value of her claim under Part III of the 1984 Act (in this case US$5 billion), in addition to other penalties under Russian law. Reported decisions in this jurisdiction suggest that large penalties have been imposed for breaches of Russian anti-suit injunctions (see, for example, Google v Tsargrad [2025] EWHC 94 (Comm), [2026] 1 All ER (Comm) 75). The wife contends that the Russian court may impose penalties even if an application for anti-suit has subsequently been withdrawn (see Magomedov & others v PJSC Transneft & others [2024] EWHC 1176 (Comm), [2024] 4 WLR 48). The Russian court may also grant freezing orders, including contra mundum orders, in aid of satisfying any astreinte imposed.[20]On 19 May 2026, the husband applied for a temporary stay of the directions made in February to allow the wife to “reflect on her position” following the grant of the Russian anti-suit injunction. The wife indicated that she intended to proceed with her application for financial remedies notwithstanding the Russian anti-suit injunction and the husband withdrew his application for a stay. No application for anti-anti-suit relief was pursued by the wife at this point.[21]Upon being informed that the husband had secured a Russian anti-suit injunction, and mindful of the approaching FDA and the court’s case management obligations, the court wrote to the parties on 22 May 2026 to enquire whether it was the wife’s intention now to make an application for injunctive relief, as foreshadowed in her Position Statement dated 23 February 2026, whether it was the husband’s intention to apply for a stay and, if so, whether such additional applications as may be made were capable of being incorporated within the one day time estimate given for the FDA on 16 June 2026.[22]On 1 June 2026, the wife applied without notice for an anti-anti-suit injunction, an anti-enforcement injunction and an anti-reliance injunction. In circumstances where the matter could not be accommodated in my list, the matter came before Lieven J who granted the wife the relief sought and listed the matter for a return date before me at the FDA on 16 June 2026. The operative terms of the order granted by Lieven J were as follows: “2. Until the determination of the Part III application or earlier order of the Court, Vladimir Olegovich Potanin shall not, whether by himself or others on his behalf or in any other way:(1) prosecute, pursue, and/or otherwise continue and/or take any further substantive or procedural step in, or procure or assist in the pursuit of:a. the Russian ASI Proceedings so far as they would have the effect of requiring the Applicants or either of them not to prosecute the present proceedings; orb. any other proceedings in Russia so far as they would have the same effect, save for the purposes of staying, adjourning, dismissing, withdrawing and/or otherwise discontinuing those proceedings; and/or(2) take any steps whatsoever to enforce or cause to be enforced: a. the Russian ASI Orders; or b. any future anti-suit injunction or penal order in respect of the applicant made in the Russian ASI Proceedings (a “Future Russian ASI or Penal Order”).(3) take any steps whatsoever to rely or cause to be relied on, in the Russian ASI Proceedings or otherwise in respect of seeking a Future Russian ASI or Penal Order or any other proceedings in Russia so far as they would have the same effect: a. Any step taken by the applicant in these proceedings, including in respect of the applicant’s D11 dated 1 June 2026 resulting in this order; b. Any failure to take steps to discontinue or otherwise ensure the complete and final termination of these proceedings. 3. Notwithstanding paragraph 2 of this Order, Vladimir Olegovich Potanin shall be entitled to oppose any appeal brought by the applicant against the Russian ASI Order or any Future Russian ASI or Penal Order. 4. Without prejudice to the foregoing provisions of this order, until the determination of the Part III application or earlier order of the Court, Vladimir Olegovich Potanin shall give notice to the applicant within 24 hours of becoming aware of any further step(s) being taken by or on behalf of any party and/ or by the Commercial (Arbitrazh) Court of Moscow or any judge thereof in the Russian ASI Proceedings.” (1) prosecute, pursue, and/or otherwise continue and/or take any further substantive or procedural step in, or procure or assist in the pursuit of: a. the Russian ASI Proceedings so far as they would have the effect of requiring the Applicants or either of them not to prosecute the present proceedings; or b. any other proceedings in Russia so far as they would have the same effect, save for the purposes of staying, adjourning, dismissing, withdrawing and/or otherwise discontinuing those proceedings; and/or (2) take any steps whatsoever to enforce or cause to be enforced: a. the Russian ASI Orders; or b. any future anti-suit injunction or penal order in respect of the applicant made in the Russian ASI Proceedings (a “Future Russian ASI or Penal Order”). (3) take any steps whatsoever to rely or cause to be relied on, in the Russian ASI Proceedings or otherwise in respect of seeking a Future Russian ASI or Penal Order or any other proceedings in Russia so far as they would have the same effect: a. Any step taken by the applicant in these proceedings, including in respect of the applicant’s D11 dated 1 June 2026 resulting in this order; b. Any failure to take steps to discontinue or otherwise ensure the complete and final termination of these proceedings.[23]The court has an approved transcript of the judgment given by Lieven J on 2 June 2026. Applying the principles set out by Lord Hobhouse in the House of Lords in Turner v Grovit, [2002] 1 WLR 107, Lieven J was satisfied, on a without notice basis, that the husband is a party to existing legal proceedings in this country, that the husband’s actions in obtaining an anti-suit injunction were for the purpose of preventing the wife’s claim here moving forward and, as such, amounted to vexatious or oppressive litigation conduct and that, with respect to the question of natural forum, it was sufficient that the Court of Appeal had granted the wife leave under s.13 of the 1984 Act to proceed with her claim. In the circumstances, Lieven J was satisfied, on a without notice basis, that it was necessary in order to protect the legitimate interest of the wife in the English proceedings to grant the relief sought.[24]At the FDA on 16 June 2026, I gave directions for a return date for the wife’s application and continued the injunctive orders made by Lieven J.[25]Finally by way of background, the husband has been involved for some time in other litigation in this jurisdiction. He is a party to ongoing commercial litigation in the King’s Bench Division in IPJSC United Company Rusal v Whiteleave Holdings Limited, Vladimir Potanin, Crispian Investments Limited and Roman Abramovich. He has not sought anti-suit relief in Russia with respect to those proceedings. The court was informed during the hearing that there is a jurisdiction clause operating that specifies the jurisdiction of England and Wales as the proper forum in that litigation. In addition, the husband has also been involved in proceedings before the First-Tier Tribunal in Potanin v Charity Commission for England & Wales [2026] UKFTT 271 (GRC).[26]The wife’s application under Part III of the 1984 Act is listed before me for final hearing in November. The wife seeks an award from the English court capped at 50% of the value of(i) the husband’s ultimate beneficial interest in c.30% of the shares in MMC Norilsk Nickel PJSC;(ii) the dividends paid on those shares since 2014; and(iii) a property, said by the wife to be the former matrimonial home in Russia, known as “Autumn House”. Based on the market capitalisation of MMC Norilsk Nickel PJSC as at February 2026, the value of the wife’s claim under the 1984 Act is in the region of US$5 billion.

RELEVANT LAW

[27]The burden of proving that the injunctive relief granted without notice on 2 June 2026 should continue is on the wife. In VTB Commodities Trading DAC v JSC Antipinsky Refinery [2020] EWHC 72 (Comm), [2020] 1 WLR 1227 at [37] Phillips LJ held as follows:
“On the return date the burden is on the applicant to persuade the court afresh to grant the relief sought, including establishing that the court has jurisdiction, without any benefit or presumption from the fact that the court has previously made an order on a without notice basis. Although the order resulting from a successful on notice application may often be expressed as a continuation or variation of the order made without notice, the reality is that a new on notice order is made which supersedes the without notice order.”
[28]Whilst on behalf of the husband, Mr Lowenstein and Mr Du urged the court to concentrate solely on the law concerning anti-suit injunctions, I am satisfied that it is necessary in this case to locate the wife’s application in its wider context, namely, her application for relief under the 1984 Act. At the time of the wife’s application Part III of the 1984 Act provided as follows: “12 Applications for financial relief after overseas divorce etc. (1)Where—(a) a marriage has been dissolved or annulled, or the parties to a marriage have been legally separated, by means of judicial or other proceedings in an overseas country, and(b) the divorce, annulment or legal separation is entitled to be recognised as valid in England and Wales, either party to the marriage may apply to the court in the manner prescribed by rules of court for an order for financial relief under this Part of this Act. ... 13 Leave of the court required for applications for financial relief. (1) No application for an order for financial relief shall be made under this Part of this Act unless the leave of the court has been obtained in accordance with rules of court; and the court shall not grant leave unless it considers that there is substantial ground for the making of an application for such an order. (2) The court may grant leave under this section notwithstanding that an order has been made by a court in a country outside England and Wales requiring the other party to the marriage to make any payment or transfer any property to the applicant or a child of the family. (3) Leave under this section may be granted subject to such conditions as the court thinks fit. ... 15 Jurisdiction of the court. (1) Subject to subsections (1A) and (2) below, the court shall have jurisdiction to entertain an application for an order for financial relief if any of the following jurisdictional requirements are satisfied, that is to say— (a) either of the parties to the marriage was domiciled in England and Wales on the date of the application for leave under section 13 above or was so domiciled on the date on which the divorce, annulment or legal separation obtained in the overseas country took effect in that country; or (b) either of the parties to the marriage was habitually resident in England and Wales throughout the period of one year ending with the date of the application for leave or was so resident throughout the period of one year ending with the date on which the divorce, annulment or legal separation obtained in the overseas country took effect in that country; or(c) either or both of the parties to the marriage had at the date of the application for leave a beneficial interest in possession in a dwelling-house situated in England or Wales which was at some time during the marriage a matrimonial home of the parties to the marriage. (1A)If an application or part of an application relates to a matter where jurisdiction falls to be determined by reference to the jurisdictional requirements of the Maintenance Regulation and Schedule 6 to the Civil Jurisdiction and Judgments (Maintenance) Regulations 2011, those requirements are to determine whether the court has jurisdiction to entertain the application or that part of it. ... (3) In this section, “the Maintenance Regulation” means Council Regulation (EC) No 4/2009 including as applied in relation to Denmark by virtue of the Agreement made on 19th October 2005 between the European Community and the Kingdom of Denmark.” 16 Duty of the court to consider whether England and Wales is appropriate venue for application. (1) Subject to subsection (3), before making an order for financial relief the court shall consider whether in all the circumstances of the case it would be appropriate for such an order to be made by a court in England and Wales, and if the court is not satisfied that it would be appropriate, the court shall dismiss the application. (2) The court shall in particular have regard to the following matters— (a) the connection which the parties to the marriage have with England and Wales; (b) the connection which those parties have with the country in which the marriage was dissolved or annulled or in which they were legally separated; (c) the connection which those parties have with any other country outside England and Wales;(d) any financial benefit which the applicant or a child of the family has received, or is likely to receive, in consequence of the divorce, annulment or legal separation, by virtue of any agreement or the operation of the law of a country outside England and Wales;(e) in a case where an order has been made by a court in a country outside England and Wales requiring the other party to the marriage to make any payment or transfer any property for the benefit of the applicant or a child of the family, the financial relief given by the order and the extent to which the order has been complied with or is likely to be complied with;(f) any right which the applicant has, or has had, to apply for financial relief from the other party to the marriage under the law of any country outside England and Wales and if the applicant has omitted to exercise that right the reason for that omission;(g) the availability in England and Wales of any property in respect of which an order under this Part of this Act in favour of the applicant could be made;(h) the extent to which any order made under this Part of this Act is likely to be enforceable;(i) the length of time which has elapsed since the date of the divorce, annulment or legal separation. (3) If the court has jurisdiction in relation to the application or part of it by virtue of the Maintenance Regulation and Schedule 6 to the Civil Jurisdiction and Judgments (Maintenance) Regulations 2011, the court may not dismiss the application or that part of it on the ground mentioned in subsection (1) if to do so would be inconsistent with the jurisdictional requirements of that Regulation and that Schedule. (4) In this section, “the Maintenance Regulation” means Council Regulation (EC) No 4/2009 including as applied in relation to Denmark by virtue of the Agreement made on 19th October 2005 between the European Community and the Kingdom of Denmark.” (a) a marriage has been dissolved or annulled, or the parties to a marriage have been legally separated, by means of judicial or other proceedings in an overseas country, and (b) the divorce, annulment or legal separation is entitled to be recognised as valid in England and Wales, (a) either of the parties to the marriage was domiciled in England and Wales on the date of the application for leave under section 13 above or was so domiciled on the date on which the divorce, annulment or legal separation obtained in the overseas country took effect in that country; or (b) either of the parties to the marriage was habitually resident in England and Wales throughout the period of one year ending with the date of the application for leave or was so resident throughout the period of one year ending with the date on which the divorce, annulment or legal separation obtained in the overseas country took effect in that country; or (c) either or both of the parties to the marriage had at the date of the application for leave a beneficial interest in possession in a dwelling-house situated in England or Wales which was at some time during the marriage a matrimonial home of the parties to the marriage. (a) the connection which the parties to the marriage have with England and Wales; (b) the connection which those parties have with the country in which the marriage was dissolved or annulled or in which they were legally separated; (c) the connection which those parties have with any other country outside England and Wales; (d) any financial benefit which the applicant or a child of the family has received, or is likely to receive, in consequence of the divorce, annulment or legal separation, by virtue of any agreement or the operation of the law of a country outside England and Wales; (e) in a case where an order has been made by a court in a country outside England and Wales requiring the other party to the marriage to make any payment or transfer any property for the benefit of the applicant or a child of the family, the financial relief given by the order and the extent to which the order has been complied with or is likely to be complied with; (f) any right which the applicant has, or has had, to apply for financial relief from the other party to the marriage under the law of any country outside England and Wales and if the applicant has omitted to exercise that right the reason for that omission; (g) the availability in England and Wales of any property in respect of which an order under this Part of this Act in favour of the applicant could be made; (h) the extent to which any order made under this Part of this Act is likely to be enforceable; (i) the length of time which has elapsed since the date of the divorce, annulment or legal separation.[29]Section 15(1A) and 16(3) were inserted into the 1984 Act to give effect to the Maintenance Regulation by the Civil Jurisdiction and Judgments (Maintenance) Regulations 2011 (SI 2011/1484). Art 3 of the Maintenance Regulation, which was in force at the relevant time, provided as follows:
“Art 3 In matters relating to maintenance obligations in member states jurisdiction shall lie with: (a) the court for the place where the defendant is habitually resident, or (b) the court for the place where the creditor is habitually resident, or (c) the court which, according to its own law, has jurisdiction to entertain proceedings concerning the status of a person if the matter relating to maintenance is ancillary to those proceedings, unless that jurisdiction is based solely on the nationality of one of the parties, or (d) the court which, according to its own law, has jurisdiction to entertain proceedings concerning parental responsibility if the matter relating to maintenance is ancillary to those proceedings, unless that jurisdiction is based solely on the nationality of one of the parties.” (a) the court for the place where the defendant is habitually resident, or (b) the court for the place where the creditor is habitually resident, or (c) the court which, according to its own law, has jurisdiction to entertain proceedings concerning the status of a person if the matter relating to maintenance is ancillary to those proceedings, unless that jurisdiction is based solely on the nationality of one of the parties, or (d) the court which, according to its own law, has jurisdiction to entertain proceedings concerning parental responsibility if the matter relating to maintenance is ancillary to those proceedings, unless that jurisdiction is based solely on the nationality of one of the parties.”
[30]The effect of Art 3 in this case with respect to forum was summarised in the Court of Appeal by Cobb LJ (as he then was) as follows: “[100] ... the effect of article 3 in a case such as this was that in matters relating to maintenance obligations in member states the maintenance creditor had the choice of where to sue; they could sue for maintenance in the creditor’s member state or pursue the debtor in the debtor’s member state. As Lord Sales JSC said in Villiers at para 29: ‘The object of the mandatory rule of jurisdiction in article 3 of the Maintenance Regulation is to afford special protection for a maintenance creditor by giving him or her the right to choose the jurisdiction most beneficial for them out of the range of options specified in that article.’ [101] Section 16(3) of the 1984 Act provided that if the court had jurisdiction in relation to the application or part of it by virtue of the Maintenance Regulation, the court could not dismiss the application or that part of it on the ground mentioned in section 16(1) of the 1984 Act if to do so would be inconsistent with the jurisdictional requirements of that Regulation. As I have said above, the Maintenance Regulation was so crafted as to make it easier for a maintenance creditor (traditionally the weaker party) to enforce his or her rights, by giving them the right to choose where to sue the maintenance debtor. Section 16(3) does not in terms disapply section 16(1) and (2) entirely where one of the qualifying criteria of the Maintenance Regulation is satisfied, but in order to give effect to its obvious statutory purpose of ensuring that the application of the Maintenance Regulation takes precedence, the court must be precluded from deciding that it was not appropriate (section 16(1) ibid) for the case to proceed in England and Wales if that would frustrate the maintenance creditor’s right to choose where to enforce their rights. [102] The scheme of this form of EU legislation is inconsistent with the court of a member state retaining any discretionary power to stay proceedings on the grounds of forum non conveniens (see the decision of the Grand Chamber of the ECJ in Owusu v Jackson (Case C-281/02) [2005] QB 801, R v P (Case C-468/18) [2020] 4 WLR 8, and again see Villiers). As Lady Black said in Villiers at para 63 (drawing from the CJEU decision in R v P): ‘The Maintenance Regulation must be considered “exhaustive”...and it does not permit a court which has jurisdiction under one of the provisions of the Maintenance Regulation to decline jurisdiction on the basis that another court would be better placed to hear the case.’ And as Lord Wilson put it at para 167 ibid: ‘if conferred with jurisdiction under the Maintenance Regulation, a member state could not decline to exercise it by reference to any principle of the less appropriate forum.’ [103] In this case, it was uncontroversial that by the time of her application the wife was habitually resident in England and Wales. She therefore satisfied article 3(b) of the Maintenance Regulation. In addition, as she had been habitually resident for at least one year preceding the date of her application for leave, she also satisfied section 15(1) of the 1984 Act. It was not therefore open to the judge to dismiss the maintenance aspect of the application on essentially forum non conveniens grounds. It is clear from what he said in Potanina(FD2) at para 79 that he applied a narrow construction of section 16(3) which did not reflect its proper scope. I would agree with Mr Nagpal that connection is irrelevant once jurisdiction is established by reason of the Maintenance Regulation; additionally, the fact that an applicant could apply for maintenance against the other party in another country (section 16(2)(f)) would be an irrelevant consideration because, as Lord Sales said in Villiers at para 29, a maintenance creditor has the right to choose the jurisdiction most beneficial for them. [104] Cohen J treated section 16(3) as limited to precluding dismissal of the claim solely on the basis of an absence of connection. In my judgment, he was wrong to do so. His error was vividly exposed by his reference to attaching weight to the finding that the wife was habitually resident in this country, notwithstanding that this was jurisdictionally determinative. In this way, the wife was wrongly denied the choice to bring her maintenance/needs claim in this country, notwithstanding that she satisfied the jurisdictional requirements of the Maintenance Regulation. This is what section 16(3) of the 1984 Act was designed to prevent.” ‘The object of the mandatory rule of jurisdiction in article 3 of the Maintenance Regulation is to afford special protection for a maintenance creditor by giving him or her the right to choose the jurisdiction most beneficial for them out of the range of options specified in that article.’ ‘The Maintenance Regulation must be considered “exhaustive”...and it does not permit a court which has jurisdiction under one of the provisions of the Maintenance Regulation to decline jurisdiction on the basis that another court would be better placed to hear the case.’ ‘if conferred with jurisdiction under the Maintenance Regulation, a member state could not decline to exercise it by reference to any principle of the less appropriate forum.’[31]I turn next to the principles that govern the determination of the wife’s application for an anti-anti-suit injunction, anti-enforcement injunction and anti-reliance injunction.[32]The equitable jurisdiction to restrain a party from instigating or pursuing proceedings in a foreign jurisdiction derives statutory force from the Senior Courts Act 1981 s.37 (as amended by the Crime and Courts Act 2013 s.61(3) and hereafter “the 1981 Act”). The editors of Dicey, Morris and Collins suggest at [12-125] that, where an application for anti-suit relief is made in existing English proceedings, it is an ancillary remedy not requiring a separate basis of jurisdiction. Section 37 of the 1981 Act provides as follows with respect to the powers of this court to grant injunctive relief: “37 Powers of High Court with respect to injunctions and receivers.(1) The High Court may by order (whether interlocutory or final) grant an injunction or appoint a receiver in all cases in which it appears to the court to be just and convenient to do so.(2) Any such order may be made either unconditionally or on such terms and conditions as the court thinks just.(3) The power of the High Court under subsection (1) to grant an interlocutory injunction restraining a party to any proceedings from removing from the jurisdiction of the High Court, or otherwise dealing with, assets located within that jurisdiction shall be exercisable in cases where that party is, as well as in cases where he is not, domiciled, resident or present within that jurisdiction.(4) The power of the High Court to appoint a receiver by way of equitable execution shall operate in relation to all legal estates and interests in land; and that power— (a) may be exercised in relation to an estate or interest in land whether or not a charge has been imposed on that land under section 1 of the Charging Orders Act 1979 for the purpose of enforcing the judgment, order or award in question; and (b) shall be in addition to, and not in derogation of, any power of any court to appoint a receiver in proceedings for enforcing such a charge.(5) Where an order under the said section 1 imposing a charge for the purpose of enforcing a judgment, order or award has been, or has effect as if, registered under section 6 of the Land Charges Act 1972, subsection (4) of the said section 6 (effect of non-registration of writs and orders registrable under that section) shall not apply to an order appointing a receiver made either— (a) in proceedings for enforcing the charge; or (b) by way of equitable execution of the judgment, order or award or, as the case may be, of so much of it as requires payment of moneys secured by the charge. (6)This section applies in relation to the family court as it applies in relation to the High Court.” (a) may be exercised in relation to an estate or interest in land whether or not a charge has been imposed on that land under section 1 of the Charging Orders Act 1979 for the purpose of enforcing the judgment, order or award in question; and (b) shall be in addition to, and not in derogation of, any power of any court to appoint a receiver in proceedings for enforcing such a charge. (a) in proceedings for enforcing the charge; or (b) by way of equitable execution of the judgment, order or award or, as the case may be, of so much of it as requires payment of moneys secured by the charge.[33]Mr Lowenstein and Mr Du submit that this is the first time a Family Court has been asked to grant an anti-anti-suit injunction. Five preliminary observations fall to be made.[34]First, the wife’s application for anti-anti-suit relief is made in a non-contractual case. I.e. the court is not being asked to restrain the foreign proceedings because of the presence of a jurisdiction clause in a contract, such as an arbitration clause, or by reason of an exclusive jurisdiction agreement.[35]Second, a distinction must be drawn between permanent anti-anti-suit relief and so called Hemain injunctions. As recognised in Mr Legg and Ms Palmer’s Skeleton Argument, in Hemain v Hemain [1988] 2 FLR 388, the Court of Appeal held that, where there are competing jurisdictions as to financial remedy proceedings, in an exceptional case the court may grant an interim injunction (known, colloquially as an ‘Hemain injunction’) that restrains a party from pursuing a case abroad until the English court has determined an application to stay the proceedings in this jurisdiction. The Court of Appeal drew on the decision of the Privy Council in Société Nationale Industrielle Aerospatiale v Lee Kui Jak [1987] AC 871 and the law relating to anti-suit injunctions restraining a party from commencing or pursuing legal proceedings in a foreign jurisdiction where such proceedings are vexatious and oppressive.[36]Whilst sometimes described as a particular type of anti-suit injunction, See, for example, B v B (Divorce: Stay of Foreign Proceedings) [2002] EWHC 1711 (Fam), [2003] 1 FLR at [44] per Munby J (as he then was). a Hemain injunction is of a different character to the anti-suit relief with which the court is concerned in this case. Munby J (as he then was) in R v R (Divorce: Hemain Injunction) [2003] EWHC 2113 (Fam), [2005] 1 FLR 386 said at [42]:
“[42] As I observed in Bloch v Bloch [2002] EWHC 1711 (Fam), [2003] 1 FLR 1 (see [73], [88], [89]), there is a difference between the normal type of anti-suit injunction considered in cases such as Aerospatiale, Airbus and Turner v Grovit and a Hemain injunction. A Hemain injunction is not a perpetual injunction permanently restraining the pursuit by a spouse of foreign proceedings; it is merely an interim injunction to maintain the status quo, to preserve a level playing field, pending the determination, typically, of that spouse’s application for a stay of the English proceedings.”
[37]Third, whilst there is no authority from the family jurisdiction dealing with anti-anti-suit injunctions, either generally or in proceedings under Part III of the 1984 Act, there is at least one instance of the court having imposed anti-suit relief in the context of financial remedy proceedings. In Ahmed v Mustafa [2014] EWCA Civ 277, [2016] 1 FCR 50, the Court of Appeal considered the position where a party has already obtained a financial remedy order in England but seeks to relitigate the same issue in another jurisdiction, with a view to obtaining more advantageous relief. In concluding that the High Court has jurisdiction to restrain a litigant, in personam, from re-litigating matters in a foreign jurisdiction where it is unconscionable to do so, the Court of Appeal drew on the decisions in South Carolina Insurance Co. v Assurantie Maatschappij “De Zeven Provincien” NV [1987] AC 24 and Société Nationale Industrielle Aerospatiale v Lee Kui Jak. Having considered the principles set out in those authorities, the Court of Appeal held that the judge in the Family Court had been entitled to impose an anti-suit injunction on the facts of the case. Ahmed v Mustafa is not on all fours with the facts of this case. In this case the issue is whether one party (the wife) who has already obtained financial relief following divorce in a foreign jurisdiction (Russia), and has been given permission to relitigate the issue of financial remedy following divorce by another jurisdiction (England), should be permitted to injunct another party (the husband) from benefiting from injunctive relief obtained in the first jurisdiction on the grounds that that relief is vexatious and oppressive.[38]Fourth, the principles applicable to anti-anti-suit injunctions are broadly similar to those applicable to anti-suit injunctions. All but one of the authorities dealt with below is concerned with anti-suit injunctive relief. As far as counsel could identify, there are no appellate cases concerning anti-anti-suit injunctions. First instance decisions concerning anti-anti-suit relief include Magomedov and others v PJSC Transneft and others (on which the wife places considerable reliance) and GoogleLLC v NAO Tsargrad Media). Given the paucity of authority on anti-anti-suit injunctions, Mr Lowenstein and Mr Du helpfully referred the court to certain passages from Raphael’s The Anti-Suit Injunction (2nd Ed.). Raphael suggests at [5.60] (as would appear logical in circumstances where the aim of the anti-anti-suit injunction is, at least conceptually, the same as the aim of the anti-suit injunction) that the approach to anti-anti-suit injunctions has been similar if not the same as that for anti-suit injunctions:
“5.60 English case law on anti-anti-suit injunctions is sparse. They have not been treated as a separate category and are analysed under the same principles as general anti-suit injunctions. In non- contractual cases, the basic tests for non-contractual anti-suit injunctions, and thus most centrally the concepts of vexation and oppression (or unconscionability) have been applied, sometimes with the modification that particular caution needs to be exercised.”
[39]Fifth, and finally, for reasons I shall come to, this return date is concerned in reality with final anti-anti-suit relief and not temporary Hemain type relief.[40]In Prest v Petrodel Resources Ltd and Ors [2013] UKSC 34, [2013] 2 AC 415 at [37] Lord Sumption observed that “Courts exercising family jurisdiction do not occupy a desert island in which general legal concepts are suspended or mean something different”. The general principles governing anti-suit relief in non-contractual cases, as distinct from Hemain type injunctions, are set out in a series of decisions of the Privy Council and the House of Lords to which I now turn, beginning with Société Nationale Industrielle Aerospatiale v Lee Kui Jak and Another.[41]In Societe Nationale Industrielle Aerospatiale v Lee Kui Jak at 892A-C Lord Goff of Chieveley summarised the history of anti-suit injunctions:
“The law relating to injunctions restraining a party from commencing or pursuing legal proceedings in a foreign jurisdiction has a long history, stretching back at least as far as the early 19th century. From an early stage, certain basic principles emerged which are now beyond dispute. First, the jurisdiction is to be exercised when the "ends of justice" require it: see Bushby v. Munday (1821) 5 Madd. 297, 307, per Sir John Leach V.-C); Carron Iron Co. v. Maclaren (1855) 5 H.L. Cas. 416, 453, per Lord St. Leonards (in a dissenting speech, the force of which was however recognised by Lord Brougham, at p. 459). This fundamental principle has been reasserted in recent years, notably by Lord Scarman in Castanho v. Brown & Root (U.K.) Ltd. [1981] A.C. 557 and by Lord Diplock in British Airways Board v. Laker Airways Ltd. [1985] A.C. 58, 81. Second, where the court decides to grant an injunction restraining proceedings in a foreign court, its order is directed not against the foreign court but against the parties so proceeding or threatening to proceed...Third, it follows that an injunction will only be issued restraining a party who is amenable to the jurisdiction of the court, against whom an injunction will be an effective remedy: see, e.g. In re North Carolina Estate Co. Ltd. (1889) 5 T.L.R. 328, per Chitty J. Fourth, it has been emphasised on many occasions that, since such an order indirectly affects the foreign court, the jurisdiction is one which must be exercised with caution: see e.g., Cohen v. Rothfield [1919] 1 K.B. 410, 413, per Scrutton L.J., and, in more recent times, Castanho v. Brown & Root (U.K.) Ltd. [1981] A.C. 557, 573, per Lord Scarman. All of this is, their Lordships think, uncontroversial; but it has to be recognised that it does not provide very much guidance to judges at first instance who have to decide whether or not to exercise the jurisdiction in any particular case.”
[42]As to the approach to be taken in determining applications for anti-suit injunctions, Lord Goff stated as follows at 896F-H:
“In the opinion of their Lordships, in a case such as the present where a remedy for a particular wrong is available both in the English (or, as here, the Brunei) court and in a foreign court, the English or Brunei court will, generally speaking, only restrain the plaintiff from pursuing proceedings in the foreign court if such pursuit would be vexatious or oppressive. This presupposes that, as a general rule, the English or Brunei court must conclude that it provides the natural forum for the trial of the action; and further, since the court is concerned with the ends of justice, that account must be taken not only of injustice to the defendant if the plaintiff is allowed to pursue the foreign proceedings, but also of injustice to the plaintiff if he is not allowed to do so. So the court will not grant an injunction if, by doing so, it will deprive the plaintiff of advantages in the foreign forum of which it would be unjust to deprive him.”
[43]English law has refrained from giving a comprehensive or limiting definition of vexatious or oppressive (see Dicey, Morris & Collins, 16th ed., at [12-132]). In R v R (Hemain Injunction) at [31], Munby J (as he then was) described the last part of the statement of Lord Goff at 896G regarding the disadvantage to the plaintiff as being “of considerable significance in the context of matrimonial cases”. Having considered the judgment of Lord Goff in de Dampierre v de Dampierre [1988] 1 AC 92, [1987] 2 FLR 300, Munby J observed as follows:
“[37] In other words, the mere fact that the husband was seeking to litigate in a foreign court in order to achieve a personal advantage – in that case a more advantageous financial settlement than he would have achieved in the English court – was not of itself any ground for denying him a stay of the English proceedings; and that, be it noted, even though the approach of the French court was treated by the House of Lords as being one ‘no longer acceptable’ in this country. Now if such conduct was not of itself any reason for denying the husband in that case a stay of the English proceedings, it must follow that it could not of itself have sufficed to ground an anti-suit injunction had the wife sought such an order from the English court. [38] So it is not of itself vexatious, oppressive or unconscionable for a husband to pursue what we would call divorce and ancillary relief proceedings in a foreign court merely because his motive for doing so is to obtain what for him will be a financially more advantageous – even much more advantageous – order and for his wife a financially less advantageous –even much less advantageous – order.”
[44]The second relevant authority is Airbus Industrie GIE v Patel and Others [1999] 1 AC 119. In Airbus Industrie GIE v Patel and Others the Privy Council was required to examine the question of whether an English court could grant an anti-suit injunction in circumstances where there is no relevant connection between the English jurisdiction and the proceedings in the other jurisdiction. At 134F Lord Goff stated that in cases where alternative countries each have jurisdiction, “an anti-suit injunction will normally only be applied for in an English court where England is the natural forum for the resolution of the dispute”. Lord Goff went on at 138G-H to conclude as follows:
“As a general rule, before an anti-suit injunction can properly be granted by an English court to restrain a person from pursuing proceedings in a foreign jurisdiction in cases of the kind under consideration in the present case, comity requires that the English forum should have a sufficient interest in, or connection with, the matter in question to justify the indirect interference with the foreign court which an anti-suit injunction entails. In an alternative forum case, this will involve consideration of the question whether the English court is the natural forum for the resolution of the dispute.”
[45]In B v B (Divorce: Stay of Foreign Proceedings) [2002] EWHC 1711 (Fam), [2003] 1 FLR 1 at [54], Munby J (as he then was) observed in respect of the principle of natural forum that: “Although, as we have seen, the principle that an anti-suit injunction will generally only be granted if England is the natural forum had been indicated in Aerospatiale, it was, as the editors of Dicey & Morris point out at para 12-065, only in Airbus that this requirement was “elevated to the status of a general rule requiring to be satisfied before the court may act”.[46]The case of de Dampierre v de Dampierre provides an example of the principle of natural forum being applied in the context of a family case. That appeal concerned discretionary stays under the Domicile and Matrimonial Proceedings Act 1973, Sch. 1, para 9. Lord Templeman having made clear at p.100 that financial advantage under English law did not make England the natural forum for the claim, Lord Goff (quoting from the judgment of Dillon LJ in the Court of Appeal) referred at p.106 to the approach to be taken in the case with respect to natural forum:
“Looking at it objectively from England, without regard to any question of jurisdiction under French law, the French court was a natural and appropriate forum for the resolution of a dispute between two French nationals who had been married in France, where there was a great deal of family fortune in France and French traditions on both sides.”
[47]Anti-suit relief is an equitable remedy founded in s.37(1) of the Senior Courts Act 1981. Where an exercise of discretion is called for with respect to a claim of equitable relief there can be no absolute or inflexible rule governing that exercise (see Donohue v Armco Inc [2001] UKHL 64, [2002] 1 All E.R. 749 at [24]). At 133E in Airbus Industrie GIE v Patel and Others, Lord Goff emphasised that the principle that comity requires that the English forum should have a sufficient interest in, or connection with, the matter in question should not be interpreted “too rigidly”, Lord Goff explaining that:
“I have therefore expressed it as a general rule. This is consistent with my statement of the law in Societe Nationale Industrielle Aerospatiale v. Lee Kui Jak [1987] A.C. 871, an alternative forum case, to the effect that "as a general rule" the court granting the injunction must conclude that it is the natural forum for the trial of the action (p. 896). It is also consistent with Judge Wilkey's statement, at pp. 926-927, that anti-suit injunctions are "most often" necessary for the two purposes which he specified. Indeed there may be extreme cases, for example where the conduct of the foreign state exercising jurisdiction is such as to deprive it of the respect normally required by comity, where no such limit is required to the exercise of the jurisdiction to grant an anti-suit injunction.”
[48]As reiterated by Bright J in Magomedov & others v PJSC Transneft & others at [83(4)], the “general rule” with respect to natural forum discussed by Lord Goff in Airbus rests firmly on a foundation of comity. In Agbaje v Agbaje [2010] UKSC 13, [2010] 1 AC 628 at [52] the Supreme Court made the following observations regarding comity in the context of proceedings under Part III of the 1984 Act:
“[52] First, comity is sometimes used not simply in the sense of courtesy to foreign states and their courts, but also in the sense of rules of public international law which establish the proper limits of national legislative jurisdiction in cases involving a foreign element. In that sense it will be contrary to comity for United Kingdom legislation to apply in a situation involving a foreign country when the United Kingdom has no reasonable relationship with the situation. That is not the case here. There is nothing internationally objectionable in legislation which gives a court power to order financial provision notwithstanding a foreign decree of divorce, whether or not the foreign court has ordered financial provision, provided that the forum has an appropriate connection with the parties or their property. The whole point of the factors in section 16(2) is to enable the court to weigh the connections of England against the connections with the foreign jurisdiction so as to ensure that there is no improper conflict with the foreign jurisdiction. That is why in Holmes v Holmes [1989] Fam 47, 53, Purchas LJ was right to note that section 16 reflected the principles of comity as between competent courts.”
[49]The third relevant authority is Turner v Grovit [2002] 1 WLR 107, in which the House of Lords gave a judgment formulating a reference to the European Court of Justice on the interpretation of the Brussels Convention on Jurisdiction and the Enforcement of Judgments in Civil and Commercial Matters 1968. Having heard full argument, the House of Lords set out the domestic law relevant to the reference. In doing so, the House of Lords again emphasised the cardinal principles relevant to determining whether to grant an anti-suit injunction to restrain proceedings in a foreign jurisdiction.[50]Lord Hobhouse reiterated in Turner v Grovit at [22] that an anti-suit injunction is addressed only to a party which is before the English court, and not to the foreign court. His Lordship observed that this proposition was:
“...established by 1834 (Lord Portarlington v Soulby (1834) 3 My & K 104, 108) and described as being grounded not upon ‘any pretension to the exercise of judicial . . . rights abroad’ but upon the fact that the party being restrained is subject to the in personam jurisdiction of the English court.”
[51]With respect to what was referred to in Turner v Grovit as “wrongful conduct”, Lord Hobhouse said as follows at [24]:
“[24] The power to make the order is dependent upon there being wrongful conduct of the party to be restrained of which the applicant is entitled to complain and has a legitimate interest in seeking to prevent. In British Airways Board v Laker Airways Ltd [1985] AC 58, 81, Lord Diplock said that it was necessary that the conduct of the party being restrained should fit "the generic description of conduct that is `unconscionable' in the eye of English law". The use of the word "unconscionable" derives from English equity law. It was the courts of equity that had the power to grant injunctions and the equity jurisdiction was personal and related to matters which should affect a person's conscience. But the point being made by the use of the word is that the remedy is a personal remedy for the wrongful conduct of an individual. It is essentially a "fault" based remedial concept. Other phrases have from time to time been used to describe the criticism of the relevant person's conduct, for example, "vexatious" and "oppressive", but these are not to be taken as limiting definitions; it derives from "the basic principle of justice": per Lord Goff, Societe Nationale Industrielle Aerospatiale v Lee Kui Jak [1987] AC 871, 893. Sometimes, as in the present case, the phrase "abuse of process" (borrowed from another context) is used to express the same general ideas but with particular reference to the effect of the unconscionable conduct upon pending English proceedings.”
[52]The need for sufficient interest, or connection, was formulated by Lord Hobhouse Turner v Grovit at [27] in terms of legitimate interest:
“[27] The applicant for a restraining order must have a legitimate interest in making his application and the protection of that interest must make it necessary to make the order. Where the applicant is relying upon a contractual right not to be sued in the foreign country (say because of an exclusive jurisdiction clause or an arbitration clause), then, absent some special circumstance, he has by reason of his contract a legitimate interest in enforcing that right against the other party to the contract. But where he is relying upon conduct of the other person which is unconscionable for some non-contractual reason, English law requires that the legitimate interest must be the existence of proceedings in this country which need to be protected by the grant of a restraining order. This was the point decided by this House in Airbus Industrie GIE v Patel [1999] 1 AC 119...The applicant for the restraining order must be a party to litigation in this country at which the unconscionable conduct of the party to be restrained is directed.”
[53]With respect to the principle of comity, in Turner v Grovit, Lord Hobhouse articulated its importance as follows at [28]:
“Similarly, English law attaches a high importance to international comity (Airbus Industrie GIE v Patel, per Lord Goff, at pp 133 and 138) and the English court has in mind how the restraining order will be perceived by foreign courts. This is the prime reason for strictly limiting the making of restraining orders on grounds of forum non conveniens. It is recognised that to make an order against a person who is a party to proceedings before a foreign court may be treated as an interference (albeit indirect) in the foreign proceedings. Thus English law requires the applicant to show a clear need to protect existing English proceedings. The protection of English proceedings is, understandably, regarded as a legitimate subject matter for an English court. It is not the concern of any other court. The order made operates in personam and relies for its enforcement solely upon the English court.”
[54]With respect to the question of utility of an anti-suit injunction, Lord Hobhouse made clear at [23] that "an injunction will only be issued restraining a party who is amenable to the jurisdiction of the court, against whom an injunction will be an effective remedy."[55]The wife also applies for an anti-enforcement injunction to prevent the husband from enforcing his anti-suit injunction against her. The court has jurisdiction to grant an anti-enforcement injunction but it is “a very serious matter” for the English court to restrain enforcement in a foreign country of a judgment of the court of that country and the power is exercised only in exceptional circumstances (see Masri v Consolidated Constructors International (UK) Ltd (No3) [2008] EWCA Civ 625, [2009] QB 503 at [93]-94]). Examples include where the respondent has acted fraudulently or the applicant for the anti-enforcement injunction had no means of knowing the judgment was being sought until it was served (Ecobank Transnational Inc v Tanoh [2015] EWCA Civ 1309, [2016] 1 WLR 2231) or where the enforcement of orders is exorbitant and infringes the sovereignty of the United Kingdom (SAS Institute Inc v World Programming Ltd [2020] EWCA Civ 599, [2020] 1 CLC 816).[56]Finally with respect to the applicable legal principles, whilst ordinarily undesirable, there is nothing in principle to stop parties litigating in two jurisdictions. In Airbus at 123G and 133G, Lord Goff observed that parallel proceedings in different jurisdictions are not of themselves regarded as unacceptable and that there is no embargo on concurrent proceedings in the same matter in more than one jurisdiction. In R v R (Hemain Injunction) Munby J (as he then was) expressed the point as follows at [56]:
“[56] There is one final point to be borne in mind. As I have already pointed out, it is fundamental that the English court has no general power to give directions as to whether, and if so how, people are to litigate in foreign courts and that, generally speaking, the English court can grant an anti-suit injunction only if there are relevant proceedings on foot in England which require to be protected against the vexatious, oppressive or unconscionable conduct of one of the parties to those proceedings. Thus the powers of the English court are very limited. The consequence is that in a case where both the English court and a foreign court assert jurisdiction, where neither is prepared to relinquish jurisdiction and where there is no unconscionable conduct justifying the English court granting a permanent anti-suit injunction, the litigants will ultimately be left to litigate freely in both jurisdictions...That is hardly desirable, but this is an area in which perfect justice is probably unattainable and even practical justice may not always be achievable.”
SUBMISSIONS The Wife

SUBMISSIONS

[57]The wife seeks a continuation of the interim orders granted by Lieven J. On behalf of the wife, Mr Legg and Ms Palmer characterise this relief as interim rather than final, in circumstances where the wife seeks for the injunctions to remain in force until the conclusion of the proceedings under the 1984 Act.[58]Mr Legg and Ms Palmer submit that the touchstone for anti-anti-suit relief is the ends of justice, as embodied in s.37 of the 1981 Act. With respect to the wider principles governing the determination of an application for an anti-anti-suit injunction, they rely on the decision of Bright J in Magomedov & others v. PJSC Transneft & others, which they contend stipulates the principles that govern non-contractual anti-anti-suit injunctions.[59]Mr Legg and Ms Palmer contend that demonstration of natural forum is not a requirement of an anti-suit injunction in the context of proceedings under Part III of the 1984 Act. They argue that the whole basis of Part III of the 1984 Act is that two jurisdictions will have been involved, the court being required to decide in such proceedings whether it would be appropriate for an order to be made by a court in England and Wales when, ex hypothesi, there have already been proceedings in a foreign country. They place reliance on Lord Goff’s statement in Airbus that natural forum is a general rule deriving from comity that is not to be applied rigidly. In the circumstances, they argue that it would be inappropriate for the English court to require the wife to demonstrate that the natural forum of the matter in dispute is England and Wales before she is able to seek anti-suit relief. Mr Legg and Ms Palmer rely on Agbaje at [49] for the proposition that the underlying application under Part III of the 1984 Act:
“...does not require the court to determine the only appropriate forum where the case may be tried more suitably for the interests of the parties and the ends of justice. No choice between jurisdictions is involved. The whole basis of Part III is that it may be appropriate for two jurisdictions to be involved, one for the divorce and one for ancillary relief.”
[60]In the alternative, Mr Legg and Ms Palmer submit that the question asked by s.16 of the 1984 Act, i.e. whether it would be “appropriate” for the court to make an order for financial relief, is analogous to deciding natural forum and therefore the case falls within the principle articulated in Magomedov & others v. PJSC Transneft & others. Namely,that “the English court must have the power to give itself the chance to decide the natural forum”.[61]In the further alternative, Mr Legg and Ms Palmer submit that it is manifestly clear that that the English court is the natural forum to determine the Part III claim, the grant of permission under that provision demonstrating sufficient connection. They contend that this must be the case at least to the extent of her needs claim, having regard to the decision of the Court of Appeal in Potanina v Potanin [2025] EWCA Civ 1136, [2026] Fam 11 and the fact that a maintenance creditor has the right to choose the jurisdiction most beneficial for them. In the assessment of natural forum, Mr Legg and Ms Palmer submit that the comity has a reduced profile in this case. They rely on the wife’s assertion that the Russian anti-suit injunction is premised on a false assertion that the husband will not have access to justice before this court, that the anti-suit relief the wife seeks is interim relief and that the principle of comity is reciprocal and the Russian court has taken steps to prevent the Part III proceedings being heard. Finally, Mr Legg and Ms Palmer rely on the observation of the Supreme Court in Agbaje v Agbaje at [52], set out above, that Part III of the 1984 Act accounts for comity.[62]Relying on Turner v Grovit, Mr Legg and Ms Palmer contend that the court should exercise its discretion in favour of continuing injunctive relief on the grounds that the anti-suit injunction secured by the husband in the Arbitrazh Court is a vexatious and oppressive attempt to block her Part III claim and, thus, there are proceedings before this court that require the protection of this court to enable the wife to pursue her claim.[63]Mr Legg and Ms Palmer argue that the timing of the husband’s application is evidence that the injunction is vexatious and oppressive. They submit that if the husband genuinely believed his sanctioned status prevented him from obtaining a fair hearing, he could and should have applied for anti-suit relief immediately upon being sanctioned in 2022. Instead, they say, the husband chose to wait until after he had lost in the Court of Appeal in Potanina v Potanin [2025] EWCA Civ 1136, [2026] Fam 11 and immediately prior to this court giving directions to move the wife’s application towards final hearing. This they contend is proof positive that the Russian application was not directed to concerns with respect to a fair trial but to frustrate the Part III claim.[64]Mr Legg and Ms Palmer further submit that the husband secured relief in Russia on the basis of a false account of his inability to access justice in England. Specifically, they assert he made no mention to the Russian court of having applied on 20 February 2026 to be excused from attending the hearing on 24 February 2026, his having attended that hearing remotely or the direction of this court that he file a witness statement confirming whether he is willing and able to give evidence at trial by video link. They also criticise the husband for not referring to proceedings ongoing in the King’s Bench Division. They further argue that the husband had no basis for asserting difficulty in obtaining legal representation where he has spent circa £7.5M on these English proceedings alone and has litigated the matter up to the United Kingdom Supreme Court.[65]Finally on the question of unconscionable or vexatious and oppressive behaviour, Mr Legg and Ms Palmer submit that the penalties under the Russian anti-suit injunction alone, which can be imposed before the wife has pursued her claim to its conclusion, are unconscionable in circumstances where they range up to the value of the wife’s claim of US$5 billion and have been recognised by courts in this jurisdiction as disproportionate, relying on Magomedov & others v. PJSC Transneft & others at [116].[66]As to utility, Mr Legg and Ms Palmer submit that although the Russian injunction has already been granted, there remains utility in injunctive relief as the Russian order does not yet grant astreinte and because of the risk of future enforcement efforts worldwide. They contend that the continuation of the anti-anti-suit injunction would not prevent the husband from advancing any arguments properly open to him at the substantive Part III hearing. By contrast, they argue that if the order of Lieven J is not continued, the wife faces the risk of monetary penalties for non-compliance up to the value of her claim. In these circumstances, Mr Legg and Ms Palmer submit that whilst an anti-anti-suit injunction cannot in this case prevent the husband obtaining a Russian injunction, it can prevent him from seeking astreinte penal relief, and therefore has significant and substantial ongoing utility. They further submit that any breach of injunctive orders made by the English court may materially limit the husband’s ability to seek to enforce penalties where the wife has assets worldwide.[67]On behalf of the wife, Mr Legg and Ms Palmer reject the contention of the husband that it was not necessary to proceed without notice before Lieven J and refute any suggestion that the wife failed at that hearing to abide by the duty of candour that applies to applications made without notice to the other party. They argue that this was plainly a “tipping off” case in circumstances where the wife’s application could have caused the husband to apply immediately for astreinte in Russia. Mr Legg and Ms Palmer also refute each of the points taken by the husband in relation to candour.

The Husband

[68]The husband resists what Mr Lowenstein and Mr Du characterise as the “wholly novel and unique” application of the wife to continue the anti-anti-suit injunction.[69]Mr Lowenstein and Mr Du submit that the continuation of that injunction would, at least in part, be a final order. In the circumstances, and where they submit that it is “vanishingly rare” for anti-suit relief to be revisited at the conclusion of proceedings, Mr Lowenstein and Mr Du submit, relying on Lansing Linde Ltd v Kerr [1991] 1 WLR 251, that the wife is required to meet a significantly stricter test than American Cyanamid in seeking to satisfy the court that the injunction should continue.[70]Relying on the obiter observations of Teare J in Sheffield United FC Ltd v West Ham United FC plc [2008] EWHC 2855 (Comm), [2009] 1 Lloyd’s Rep 167, Mr Lowenstein and Mr Du submit that the correct test is whether the wife is entitled to a final injunction, albeit with the law uncertain as to whether that means the case must be made out to a high standard or to the balance of probabilities. Overall, Mr Lowenstein and Mr Du’s submissions proceeded on the basis that the wife is required to establish her case to a “high standard”. With respect to the mandatory orders that the wife seeks, requiring the husband to give the wife notice within 24 hours of becoming aware of any further steps being taken in the Russian proceedings, Mr Lowenstein and Mr Du submit that the decision of Henshaw J in Renaissance Securities (Cyprus) Limited v ILLC Chlodwig Enterprises & Others [2024] EWHC 1827 (Comm) at [41] details the correct approach.[71]With respect to the law governing anti-anti-suit relief, Mr Lowenstein and Mr Du argue that the wife wrongly seeks to elide the legal principles governing anti-suit relief with the legal principles governing proceedings under Part III of the 1984 Act. The husband takes no point as to the jurisdiction of the English court with respect to the Part III proceedings. As noted by Cobb LJ (as he then was) in the Court of Appeal at [45], jurisdiction based on habitual residence for the purposes of s.15(1) of the 1984 Act, and Art 3 of the Maintenance Regulation in respect of the wife’s needs based claim, was “uncontentious”. Mr Lowenstein and Mr Du submit, however, that this application concerns only the legal principles governing anti-suit relief, the principles under Part III of the 1984 Act being irrelevant to the court’s determination of whether the anti-anti-suit injunction and related injunctions should continue.[72]As such, Mr Lowenstein and Mr Du contend that the court is required to be satisfied(a) that having regard to the demands of comity, England is the ‘natural forum’ for the main proceedings, otherwise expressed as a need to show that the English forum has a “sufficient interest in, or connection with” the matter in question to justify indirect interference with the Russian court;(b) that the husband’s conduct in seeking a Russian anti-suit injunction was unconscionable or vexatious and oppressive;(c) that the discretionary elements of the jurisdiction to grant injunctive relief are met (including absence of delay and absence of submission to a foreign jurisdiction);(d) that the enhanced standard for the mandatory elements of the order sought by the wife are met; and(e) that there has been no failure of full and frank disclosure or fair presentation of sufficient materiality to justify the discharge of the injunction.[73]Mr Lowenstein and Mr Du submit that the wife cannot establish to a high standard that England is the natural forum for the dispute between her and the husband.[74]Mr Lowenstein and Mr Du remind the court that jurisdiction and forum are separate concepts. They contend that natural forum for the purposes of this application is not established by the granting of permission under s.13 of the 1984 Act, nor by the requirement under s.16 of the 1984 Act that the court determine whether England and Wales is the appropriate venue. They rely on the fact that Agbaje v Agbaje makes clear that this court is not required to decide natural forum under either statutory provision.[75]Mr Lowenstein and Mr Du further submit that where the matter in dispute is the financial consequences of the divorce proceedings in Russia, the application under Part III for more advantageous ancillary relief in England cannot replace the Russian divorce as the matter in dispute for the purposes of determining natural forum, any more than the wife’s application in de Dampierre replaced the financial consequences of divorce in France as the matter in dispute. It is not, they argue, sufficient for the wife simply to demonstrate that she has a claim under the 1984 Act and that the natural forum for an English law claim is England. Finally, Mr Lowenstein and Mr Du submit that the exception in Magomedov cannot apply in this case as this court has already determined it has jurisdiction and the husband accepts that determination.[76]In submitting that the natural forum is Russia, Mr Lowenstein and Mr Du contend that that conclusion must be correct in light of uncontested facts that they submit are even more persuasive than the facts in de Dampierre. Namely, that the husband and wife were born in Russia, were educated in Russia, met at school in Russia, were married in Russia and had a Russian wedding ceremony and lived in Russia throughout their 30 year marriage until their divorce. Mr Lowenstein and Mr Du further highlight that neither the wife nor the husband spent any time in England during their marriage, that the wealth in dispute is located in Russia, that both the husband and the wife remain Russian citizens, that the wife sought and was awarded RUB1.87 billion and substantial child support in Russia, that the wife can and does litigate in Russia and is able to obtain all redress to which she is entitled to Russia, that the wife’s complaint in these proceedings centres on the operation of Russian law and the wife’s claim is for the value of Russian assets. Having regard to these matters, the husband submits that the wife simply cannot establish, and certainly not to a high standard, that England is the natural forum for the dispute.[77]In any event, Mr Lowenstein and Mr Du submit that the husband’s actions in seeking an anti-suit injunction in Russia cannot be construed by this court as unconscionable or as vexatious and oppressive.[78]Through Mr Lowenstein and Mr Du, the husband is frank in making clear that he did seek a Russian anti-suit injunction with the intention of bringing the English proceedings to an end. They submit that the authorities make clear that this is neither vexatious nor oppressive in itself. They contend that, as he was entitled to do, the husband invoked Russian law in the State of his nationality and domicile, enacted to meet his precise circumstances as a sanctioned person. Mr Lowenstein and Mr Du submit that the husband has an unfettered right to access his own courts as a Russian citizen accessing Russian law. They point to the fact that once the husband’s remedies in England were exhausted after the Supreme Court refused him permission to appeal the grant of leave to the wife, and in circumstances where there is no requirement to bring an application under Articles248.1 and248.2 promptly or within a particular time period, he applied as he was entitled to do for an anti-suit injunction only eight weeks later.[79]In refuting the charge of unconscionability, Mr Lowenstein and Mr Du further point to the fact that the husband gave the wife, and the English court, notice of the proceedings in Russia, that the wife engaged in those proceedings with legal representation and lost on the merits and that the wife has and has exercised her right of appeal. Mr Lowenstein and Mr Du further rely on the fact that the wife did not apply to the Russian court of an adjournment pending the determination of these proceedings or for anti-suit relief on being given notice of the Russian proceedings, that she did not complain that the Russian proceedings were being conducted on an unduly expedited basis and made no application for the Russian judge to recuse himself.[80]On behalf of the husband, Mr Lowenstein and Mr Du refute the wife’s assertion that he advanced untenable arguments before the Russian court regarding his ability to access justice in England. Relying on the expert evidence of Ms Petrol, they argue that as a matter of Russian law the husband is entitled to an anti-suit injunction because he is subject to sanctions, Articles248.1 and248.2 not containing a threshold requirement to establish that the ability to participate in litigation in the particular case has been compromised. In so far as the wife submits that Ms Petrol’s advice is contrary to the guidance issued by the Russian Constitutional Court, which is Mr Kulkov’s expert opinion, Mr Lowenstein and Mr Du submit that this court can go no further in the context of this application than to conclude that the parties and their appointed experts disagree about the matter.[81]On behalf of the husband, Mr Lowenstein and Mr Du likewise invite the court to reject the wife’s assertion that the penal element of the Russian anti-suit injunction is unconscionable on its face. Mr Lowenstein and Mr Du caution the court against extrapolating arbitrariness or disproportionality from the maximum amount of the penalty in this case, arguing that the maximum penalty results simply from the application of an ordinary statutory penalty to a very large claim. They point to the fact that all English anti-suit injunctions carry a penal notice, including a warning that breach may lead to a fine or seizure of assets, that the English court does not shrink from imposing such sanctions where there is a breach. Mr Lowenstein and Mr Du submit that the penal element of the Russian anti-suit injunction cannot be characterised as an arbitrary, open ended penalty when the penal element is spelled out in the Russian statute, has a clear purpose, namely, they submit, to reverse the effect of any breach on the party benefiting from the injunction and mark the seriousness with which the Russian court treats that breach. The husband further submits that there is no suggestion in this case of the kind of penalty imposed in Google LLC v NAO Tsargrad Media [2025] EWHC 94 (Comm) and that Magomedov was concerned with a different issue, namely the unconscionability of forcing a party to either abandon an English jurisdiction challenge or face severe financial penalties.[82]Finally, Mr Lowenstein and Mr Du invite the court to reject the wife’s wider assertion that she was, and is, at a disadvantage in the Russian court due to the husband’s “power and influence in Russia” (as it was put before Lieven J). Mr Lowenstein and Mr Du rely on Cherney v Deripaska [2008] EWHC 1530 (Comm), [2009] 1 All ER (Comm) 333 at [237], citing The Abidin Daver [1984] AC 398 at p. 411 per Lord Diplock in inviting the court to find there is no “positive and cogent” evidence of injustice in the foreign forum and to conclude, as Cohen J did in Potanina v Potanin [2019] EWHC 2956 (Fam) at [40], that on the evidence it is “not credible that there has been a widespread conspiracy amongst the members of the Russian judiciary to do [the wife] down.” The husband relies on the fact that he lost two interim applications in the Russian anti-suit proceedings and on one occasion by the Russian Supreme Court in the divorce proceedings, and that he or his companies have been on the losing side in other significant litigation. Mr Lowenstein and Mr Du submit that when appealing decisions in Russia, the wife has never alleged that courts had afforded preferential treatment to the husband or shown judicial favouritism.[83]With respect to the equitable factors, Mr Lowenstein and Mr Du submit that the wife delayed unreasonably in seeking anti-anti-suit relief having learnt of the husband’s application in Russia on 19 February 2026 but not having made her own application until 1 June 2026, over three months later, just under two weeks after the Russian court made its orders. They submit that the wife is prevented from relying on Magomedov as evidence that any application for anti-suit relief prior to the judgment of the Russian court would have been futile by reason of the rule in Hollington v Hewthorne [1943] KB 587. Mr Lowenstein and Mr Du further submit that the English court should deny the wife equitable relief in circumstances where she has submitted to the jurisdiction of the Russian court, both in the main divorce proceedings and in appearing at and contesting the Russian anti-suit proceedings. The wife’s failure to apply for a stay of the latter proceedings is, say Mr Lowenstein and Mr Du, a further reason for this court to deny her equitable relief.[84]With respect to the mandatory element of the order sought by the wife, requiring the husband to notify the wife of further steps taken by or on behalf of a party or “by the Commercial (Arbitrazh) Court of Moscow or any judge thereof in the Russian ASI Proceedings”, Mr Lowenstein and Mr Du submit there is no basis for the imposition of a mandatory injunction in these terms. In short, they contend that such an order is unduly onerous, the wife advances no real argument in favour of it, convenience is not remotely sufficient and the court cannot have a high degree of assurance that the wife will succeed at trial or that her case is unusually strong and clear.[85]Finally, Mr Lowenstein and Mr Du submit that the wife did not make full and frank disclosure to Lieven J at the without notice hearing on 2 June 2026 such that the injunctive relief should be discharged and not reinstated. In short, Mr Lowenstein and Mr Du contend that, contrary to the basic principle set out in Siporex Trade SA v Comdel Commodities Ltd [1986] 2 Lloyd’s Rep 428 by Bingham J (as he then was) at p. 437 that the applicant must disclose all facts which reasonably could or would be taken into account by the judge in deciding whether to grant the application and draw the court’s attention to significant factual, legal and procedural aspects of the case in a fairly presented application, the wife did not meet this high duty of first importance.

DISCUSSION

[86]Having considered carefully the erudite and comprehensive submissions of leading and junior counsel in this case, I am satisfied that the wife’s application for injunctive relief should be refused. My reasons for so deciding are as follows.[87]From the foregoing exegesis of the law can be derived the following principles applicable to determining the wife’s application for anti-anti-suit injunctive relief: i) On this return date, the burden is on the wife to persuade the court afresh to grant the relief sought, including establishing that the court has jurisdiction, without any benefit or presumption from the fact that the court has previously made orders on a without notice basis (VTB Commodities Trading DAC v JSC Antipinsky Refinery). ii) Where the court is satisfied that the orders sought are in the nature of final injunctive relief, the wife’s case must be made out to a high standard, commensurate with the granting of final relief (Sheffield United FC Ltd v West Ham United FC plc). An anti-enforcement injunction is a very serious matter that will only be granted in exceptional circumstances (Masri v Consolidated Constructors International (UK) Ltd (No3)). For mandatory injunctive relief, the wife must provide the court with a high degree of assurance that the injunction is rightly granted (Renaissance Securities (Cyprus) Limited v ILLC Chlodwig Enterprises & Others). iii) The principles applied by the court when determining the wife’s application for an anti-anti-suit injunction in a non-contractual case will be broadly the same as the approach taken to anti-suit injunctions in such a case (Raphael, The Anti-Suit Injunction (2nd Ed.) at [5.60]). iv) Where the court decides to grant an injunction restraining proceedings in a foreign court, its order operates in personam. The order is directed not against the Russian court but against the party proceeding, or threatening to proceed, in the foreign jurisdiction, in this case the husband (Societe Nationale Industrielle Aerospatiale v Lee Kui Jak and Turner v Grovit). v) The operative principle is the ends of justice. Under English law, the court may restrain a party from instituting or continuing proceedings in a foreign court when the ends of justice require it (Societe Nationale Industrielle Aerospatiale v Lee Kui Jak and Airbus Industrie GIE v Patel), where it is necessary in the interests of justice (Deutsche Bank AG v Highland Crusader Offshore Partners LP [2009] EWCA Civ 725; [2010] 1 WLR 1023) or, more archaically, where the foreign proceedings are “contrary to equity and good conscience” (Carron Iron Co v Macclaren (1855) 5 HLC 416, 439). Since the court is concerned with the ends of justice, account must be taken not only of injustice to the wife if the husband is allowed to benefit from the proceedings in Russia, but also of injustice to the husband if he is not allowed to do so (Societe Nationale Industrielle Aerospatiale v Lee Kui Jak). vi) The limiting principle is comity. English law attaches a high importance to international comity (Airbus Industrie GIE v Patel and Turner v Grovit). Whilst the anti-anti-suit relief is not intended to be addressed to, nor to bind, the Russian court it is nonetheless an indirect interference with the Russian court and, therefore, caution and restraint should be exercised by the English court (Societe Nationale Industrielle Aerospatiale v Lee Kui Jak and Airbus Industrie GIE v Patel and Others). vii) In the context of anti-anti-suit relief, the limiting principle of comity is mediated through the question of sufficient interest, in circumstances where it would not be contrary to comity for United Kingdom legislation to apply in a situation involving a foreign country when the United Kingdom has no reasonable relationship with the situation (Agbaje v Agbaje). Before anti-anti-suit relief is granted restraining foreign anti-suit proceedings, comity requires that the English forum have a sufficient interest in, or connection with, the matter in dispute in order to justify indirect interference with the Russian court. As this case concerns two forums, determining sufficient interest will involve consideration of the question of whether the English court is the natural forum for the resolution of the matter in dispute (Airbus Industrie GIE v Patel and Others) or has a legitimate interest by reason of there being proceedings before it (Turner v Grovit). The stronger the connection of the Russian court with the parties and the subject matter of the dispute, the stronger the argument against intervention by the English court (Deutsche Bank AG v Highland Crusader Offshore Partners LP). viii) The decision whether or not to grant anti-anti-suit relief involves an exercise of discretion (Deutsche Bank AG v Highland Crusader Offshore Partners LP). Where an exercise of discretion is called for with respect to a claim of equitable relief there can be no absolute or inflexible rule governing that exercise (Donohue v Armco Inc). In the circumstances, in a case involving two jurisdictions the requirement of natural forum or legitimate interest is a general rule that should not be interpreted too rigidly (Airbus Industrie GIE v Patel and Others). ix) The English court will, generally speaking, only restrain the husband from pursuing proceedings in the Russian court if such pursuit would be vexatious and oppressive (Societe Nationale Industrielle Aerospatiale v Lee Kui Jak and Deutsche Bank AG v Highland Crusader Offshore Partners LP) or unconscionable (Turner v Grovit and R v R (Divorce: Hemain Injunction)). x) The terms ‘vexatious’ and ‘oppressive’ are not to be taken as limiting definitions (Turner v Grovit) and English law has refrained from giving a comprehensive or limiting definition of unconscionability. However, it is not of itself vexatious, oppressive or unconscionable for a party to pursue proceedings in a foreign court merely because their motive for doing so is to obtain relief that for them will be financially more advantageous (R v R (Divorce: Hemain Injunction)). xi) In circumstances where the remedy is an equitable one granted when the ends of justice require it, the court must consider whether there are any factors that militate against the granting of equitable relief, for example delay, lack of ‘clean hands’ or, in respect of any interim relief that a party seeks to continue, a breach of the duty of candour. xii) With respect to the question of utility, an injunction will only be issued restraining a party who is amenable to the jurisdiction of the court, against whom an injunction will be an effective remedy (Turner v Grovit). xiii) Parallel proceedings in different jurisdictions are undesirable but are not, of themselves, regarded as unacceptable. There is no embargo on concurrent proceedings in the same matter in more than one jurisdiction, even if they may lead to inconsistent judgments (Airbus Industrie GIE v Patel, R v R (Divorce: Hemain Injunction) and Deutsche Bank AG v Highland Crusader Offshore Partners LP).

Interim or Final Relief?

[88]Whilst the wife proceeded on the basis that she is seeking an interim anti-anti-suit order, anti-enforcement order and anti-reliance order, that will be revisited upon the determination of the proceedings under Part III of the 1984 Act, the husband contends that the wife seeks what, in effect, is final injunctive relief. I consider that there is force in that latter contention.[89]The wife contends that the orders made by Lieven J on 2 June 2026 should be continued “until the determination of the Part III application”, at which point the need for injunctive relief will be revisited. However, the husband already has the benefit of a Russian anti-suit injunction granted on 18 May 2026. In addition to ordering the wife to terminate these proceedings, that anti-suit injunction prohibits the wife from supporting, in whole or in part, the claims made in these proceedings and from applying in these proceedings for any interim or final anti-suit injunction, anti-enforcement injunction or other orders granting interim measures against the husband. The wife has not terminated the proceedings and has taken, and seeks to take, actions prohibited by the Russian anti-suit injunction under the cover of a continued English anti-anti-suit injunction. In the circumstances, unless the injunctive relief she seeks remained in place, she would be exposed to the penalties provided for under the existing Russian anti-suit injunction.[90]Accordingly, if granted at this point, it is very difficult to see how the anti-anti-suit relief could be revisited upon the conclusion of the proceedings without the wife being exposed to the risk of penalty. In these circumstances, and where the issue of jurisdiction is not in dispute, I am satisfied that the anti-anti-suit relief sought by the wife has the character of final injunctive relief. I.e. the court is concerned with a final anti-anti-suit injunction, anti-enforcement injunction and anti-reliance injunction and not a Hemain type injunction remaining in place until the question of jurisdiction is determined.

Standard of Proof

[91]In the foregoing circumstances, I am further satisfied that the standard of proof is a high standard, commensurate with the granting of final relief. The burden that rests on the wife is one that requires her to persuade the court to a high standard that the continuation of the anti-anti-suit injunctive relief is merited. I also bear in mind that an anti-enforcement injunction is an exceptional step. With respect to the mandatory injunction sought by the wife that requires the husband to notify the wife of developments in the proceedings in Russia, I am satisfied that the wife must provide the court with a high degree of assurance that such an injunction is rightly granted.

Overall Approach

[92]It has been recognised that there will be some cases that do not fit into the legal framework summarised above but yet call for injunctive relief (see Stichting Shell Pensioenfonds v Krys [2014] UKPC 2015, [2015] AC 616). As noted by the editors of Dicey, Morris and Collins at [12-32] “the English courts...have deliberately refrained from marking the outer extent of their power to act to restrain conduct which may give rise to injustice or, if the need for caution is given its due weight, serious injustice”.[93]In this regard, I acknowledge that the wife places considerable reliance on the decision in Magomedov & others v PJSC Transneft & others. However, I consider Magomedov to be distinguishable on its facts and of limited assistance in this case. Magomedov was a case in which jurisdiction remained in dispute. The court ultimately granted a species of temporary or interim Hemain injunction to remain in place for as long as it took the English court to determine that question (Bright J applying Hemain in reaching his decision). Further, in so far as Bright J did not feel bound to consider the question of natural forum when determining whether to grant anti-anti-suit relief, this was expressly in the context of noting that Lord Goff stated in Airbus at 133F that natural forum arises as an issue in the context of the need for the court to have regard to comity when exercising jurisdiction. Once again, in Magomedov jurisdiction remained in issue. Finally, whilst noting the arguments deployed as to whether the requirement of natural forum is apposite in a case concerning anti-anti-suit injunctions, Bright J made clear in Magomedov that he was not seeking to lay down any general principles.[94]There is no relevant dispute as to jurisdiction in this case regarding the matter in dispute. The husband accepts, for present purposes, that the English court has jurisdiction under Part III of the 1984 Act. In the circumstances, I am satisfied that in determining whether the ends of justice require the wife’s application to be granted, the court will first need to determine whether the English forum has a sufficient interest in, or connection with, the matter in dispute between the wife and the husband in order to justify indirect interference with the Russian court. In circumstances where this case concerns two forums, determining sufficient interest will involve appropriate consideration of whether the English court is the natural forum for the resolution of the matter in dispute or has a legitimate interest by reason of there being proceedings before it. If so, the court will thereafter need to determine whether the husband’s conduct in securing a Russian anti-suit injunction is unconscionable or vexatious and oppressive. Finally, the court will need to consider whether there are any factors that militate against the granting of equitable relief in this case.

Comity

[95]In considering the wife’s application, I remind myself that English law attaches a high importance to international comity. Although the injunctive relief sought by the wife is not addressed to, nor intended to bind, the Russian court, should the court grant such relief, that relief will constitute an indirect interference in the Russian court. Having regard to the demands of comity, by her the anti-enforcement injunction the wife seeks to restrain enforcement in Russia (as well as elsewhere) of a judgment made by the Russian court. The latter order is made only in exceptional circumstances.[96]The English court will not follow the demands of comity blindly. However, I am not persuaded by the submission of Mr Legg and Ms Palmer that comity has a “reduced profile” in this case. As I will come to, the wife’s assertion that the Russian anti-suit injunction was premised on a false assertion by the husband that he would not have access to justice before this court is not borne out to the requisite high standard by the evidence. Mr Legg and Ms Palmer’s submission that the impact of comity is limited in this case where the anti-suit relief the wife seeks is interim relief is undermined by my conclusions regarding the essentially final nature of the injunctive relief sought. I am also not satisfied that the fact that the Russian court has granted an anti-suit injunction that acts in personam against the wife, preventing her from pursuing proceedings in this jurisdiction, should by itself cause the court to dilute the precepts of comity. Finally, I am not satisfied that there are grounds for a dilution of comity based on the wife’s criticisms of the Russian court.[97]For the purposes of the present application, I accept that there remains no “positive and cogent” evidence of conspiracy, injustice or bias in the Russian forum. The wife made no application for recusal of the judge dealing with the case in Russia. As noted above, it is common ground between the parties that the proceedings in the Arbitrazh Court took place on notice to the wife, that the wife has been represented in those proceedings by her Russian lawyers, who attended four inter partes hearings on her behalf and that the wife fully contested the husband’s application, including applying to discontinue the proceedings on the grounds that the Arbitrazh Court lacked jurisdiction under Art 248.2. The wife has a right of appeal in Russia, which she is now exercising.[98]Where the principle of comity is mediated in the context of anti-anti-suit relief, through the question of sufficient interest, and this case involves two jurisdictions, I turn next to the question of natural forum or legitimate interest.

Natural Forum/ Legitimate Interest

[99]In circumstances where there can be no absolute or inflexible rule governing a claim of equitable relief the authorities make clear that the principle that comity requires the English forum to have a sufficient interest in, or connection with, the matter in question should not be interpreted “too rigidly”. This is the logical consequence of the broad principle being the ends of justice. In my judgment, this allows the court to take into account a wide range of circumstances when determining whether England is the natural forum for the matter in dispute, including the nature of the underlying action. Adopting this approach, I am satisfied that the wife can demonstrate to a high standard that England is the natural forum. In the alternative, I am satisfied that the wife can demonstrate to a high standard that the English court has a legitimate interest by reason of there being proceedings before it requiring protection should unconscionable or vexatious and oppressive behaviour on the part of the husband be demonstrated by the wife.[100]As the Court of Appeal made clear in Potanina v Potanin [2025] EWCA Civ 1136, [2026] Fam 11, relying on the decision of the Supreme Court in Villiers v Villiers [2020] UKSC 30, [2021] AC 838, the effect of Art 3 of the Maintenance Regulation in this case is that the wife had a choice of where to pursue her needs claim. She elected to pursue it in England. The wife having elected to pursue her needs claim in this jurisdiction, the Court of Appeal was clear that s.16(3) of the 1984 Act means that this court is precluded from deciding that it is not appropriate for the case to proceed in England and Wales where that would frustrate the wife’s right to choose where to enforce her rights. In the circumstances, the Court of Appeal determined that it was not open to Cohen J to dismiss the maintenance aspect of the wife’s application “on essentially forum non conveniens grounds”. In this context, at [71] the Court of Appeal recorded that on behalf of the husband:
“Lord Faulks accepted the wife’s argument that the Maintenance Regulation gave the court jurisdiction at the time of the application, and prevented a party arguing that the dispute should be heard in another forum.”
[101]In circumstances where the wife is entitled under the Maintenance Regulation to choose in which forum to pursue her needs claim, and once she has done so another party is prevented from arguing that the dispute should be heard in a different forum, I am satisfied to a high standard that the natural forum in relation to the wife’s needs claim is England. It is important to be clear that this conclusion does not prefigure any decision the court may make in due course under s.16 of the 1984 Act. In the alternative, I am satisfied that the wife’s needs claim grounds a legitimate interest on the part of the English court by reason of there being proceedings before the English court, which would need to be protected were the wife able to demonstrate unconscionable or vexatious and oppressive behaviour by the husband.[102]With respect to the wife’s ‘sharing’ claim under Part III of the 1984 Act, I acknowledge that the husband’s arguments on the question of natural forum have significantly more traction. There is considerable force in the husband’s reliance on the fact that the husband and wife were born in Russia, educated in Russia, married in Russia, had a Russian wedding ceremony, lived in Russia throughout their 30 year marriage, did not spend any time in England during their marriage, remain Russian citizens and are disputing wealth that is located in Russia based on arguments centring on the operation of Russian law.[103]However, the natural forum rule is expressed to be a non-rigid, general rule because the overarching principle is the ends of justice. Strict, inflexible rules should not be allowed to impede the ultimate goal of doing justice between the parties. In circumstances where the natural forum for the wife’s needs claim is England and the sharing claim concerns the same parties and falls to be decided on the same evidence, there is a stronger argument than might ordinarily be the case that England is also the natural forum for the sharing claim under the 1984 Act. This conclusion is reinforced where an application for an anti-suit or anti-anti-suit injunction made in Part III proceedings will necessarily be made, and is made in this case, in the context of there having been a divorce in another jurisdiction that is the natural forum for that divorce. This does result in the English court determining that claim in the context of the matters set out in the previous paragraph. However, a non-rigid application of natural forum in this case must take account of the fact that England is beyond peradventure the natural forum of the wife’s needs claim.[104]In these particular circumstances, I am satisfied that England is also the natural forum for the wife’s sharing claim. Again, this conclusion does not prefigure any decision the court may make in due course regarding the court’s decision under s.16 of the 1984 Act. Again, in the alternative, I am satisfied that the wife’s sharing claim under Part III of the 1984 Act grounds a legitimate interest on the part of the English court by reason of being proceedings which would need to be protected if the wife were to be able to demonstrate unconscionable or vexatious and oppressive behaviour by the husband.

Unconscionable or vexatious and oppressive behaviour

[105]Whether sufficient interest is evaluated by reference to natural forum (Airbus Industrie GIE v Patel and Others) or legitimate interest by reason of there being proceedings before the court (Turner v Grovit), the authorities are clear that equity can be called upon in such circumstances by reason of unconscionable or vexatious and oppressive behaviour. Whilst I am satisfied that the wife can demonstrate to a high standard that England is the natural forum or, in the alternative, that the English court has a legitimate interest, I am not satisfied that she can demonstrate to a high standard that the husband’s actions in seeking and obtaining a Russian anti-suit injunction are unconscionable or vexatious and oppressive.[106]Properly analysed, the wife’s case is that(a) the timing of the husband’s application to the Russian Court(b) the information provided, or not provided, to the Russian court and(c) the nature and extent of the penal provisions contained in the Russian anti-suit injunction, demonstrate to a high standard unconscionable or vexatious and oppressive behaviour by the husband. It is important to recall, when considering the question of unconscionable or vexatious and oppressive behaviour, that this court is again concerned with the actions of the husband rather than those of the Russian court. With respect to the Russian court, as made clear by, Lord Hobhouse in Turner v Grovit at [26]:
“For the foreign court, its jurisdiction and whether to exercise that jurisdiction falls to be decided by the foreign court itself in accordance with its own laws (including Conventions to which the foreign country may be a party). The jurisdiction which the foreign court chooses to assume may thus include an extraterritorial (or exorbitant) jurisdiction which is not internationally recognised. International recognition of the jurisdiction assumed by the foreign court only becomes critical at the stage of the enforcement of the judgments and decisions of the foreign court by the courts of another country. Restraining orders come into the picture at an earlier stage and involve not a decision upon the jurisdiction of the foreign court but an assessment of the conduct of the relevant party in invoking that jurisdiction.”
[107]With respect to the timing of the husband’s application to the Russian Court, it is the case that the husband did not apply under Art 248 of the Russian Arbitrazh Code at the point at which he became a sanctioned individual in 2022. The wife contends that the timing of the husband’s application is thus shown to be unconscionable or vexatious and oppressive intent because he relied before the Russian court on submissions regarding fair trial and access to justice that, if valid, could have been made from the point at which he became entitled to apply for relief in Russia. The husband accepts that he did not apply for such relief in Russia until he had been refused permission by the Supreme Court to appeal against the decision of the Court of Appeal to permit the wife to proceed with her claim. However, I accept the submission of Mr Lowenstein and Mr Du that, considered in context, this course does not demonstrate to a high standard unconscionable or vexatious and oppressive behaviour.[108]The husband does not dispute that he chose to wait to apply for Russian anti-suit relief until after he had lost in the Court of Appeal in Potanina v Potanin [2025] EWCA Civ 1136, [2026] Fam 11 and immediately prior to this court giving directions to move the wife’s application towards final hearing. He contends that having persisted in his resistance in this jurisdiction until his options were exhausted, which they were with the refusal of permission to appeal by the Supreme Court, he made an application for an anti-suit injunction in the State of his nationality and domicile under a law enacted to meet his precise circumstances as a sanctioned person at the point in the litigation that it became necessary to do so. The husband is frank in stating that he sought the Russian anti-suit injunction with the intention of bringing the English Part III proceedings to an end. I am not satisfied that this course of action demonstrates unconscionable or vexatious and oppressive behaviour.[109]As was made clear in Societe Nationale Industrielle Aerospatiale v Lee Kui Jak, there is no presumption that a multiplicity of proceedings is vexatious. There is also nothing inherently oppressive or vexatious about a party pursing legal options available to that party in another jurisdiction. As made clear by Munby J (as he then was) in R v R (Hemain Injunction) at [71]:
“Whether or not England is the natural forum it is not in all the circumstances unconscionable for the husband to want to pursue what are on the face of it perfectly proper proceedings in what is from his perspective an entirely natural and, indeed, more appropriate forum...Nor is it unconscionable for the husband to litigate in the forum of his choice merely because his motive for doing so – if indeed this is his motive – is to obtain what for him will be financially a significantly more advantageous order. He is as entitled to seek that personal or juridical advantage in Denmark as the wife is entitled to seek a corresponding advantage in this country.”
[110]I am satisfied that waiting to deploy an alternative, lawful, litigation strategy in another jurisdiction until other options have been exhausted, or until that litigation option is of the greatest utility to the party deploying it, is not of itself probative of unconscionable or vexatious and oppressive behaviour. Prior to the decision of the Court of Appeal to grant the wife permission, the husband had no need of anti-suit relief. He had successfully resisted the wife’s application before Cohen J and, when that decision was overturned by the Court of Appeal, he was successful in the Supreme Court. Further, upon deciding that he needed to have recourse to the Russian court upon being refused permission to appeal by the Supreme Court, the husband gave the wife and the English court notice of the anti-suit proceedings in Russia, which the wife then participated in fully with the benefit of legal representation. Only once she had been unsuccessful in resisting the Russian proceedings did the wife seek equitable relief here. These matters fall short of demonstrating unconscionable or vexatious and oppressive behaviour on the part of the husband.[111]The wife contends that the husband’s unconscionable or vexatious and oppressive behaviour is further demonstrated by the fact that he gave a misleading account to the Russian court of his ability to obtain access to justice and a fair trial in this jurisdiction.[112]I acknowledge that in my judgment following the first case management hearing before me in February I made the following findings:
“[35] I am further satisfied that there is no force in the husband’s submission that his status as an individual sanctioned under the 2019 Regulations prevents him from participating effectively in these proceedings. [36] I accept the wife’s submission that the husband’s contention that he is unable to participate, and is prejudiced, in the proceedings is undermined by the facts. The husband has, self-evidently, been able to participate in these proceedings, up to and including a successful appeal to the United Kingdom Supreme Court, notwithstanding his designation as a sanctioned individual from 29 June 2022. I further accept that the husband’s contended inability to participate in these proceedings as a sanctioned individual is undermined by the fact that the husband is actively involved as a party to proceedings in the King’s Bench Division. As he has done at this hearing, the husband is able to participate in these proceedings remotely if he is not able to attend hearings in person by reason of his sanctioned status.”
[113]These conclusions on the husband’s case regarding access to justice relate, however, to claims made by the husband to the English court. It is necessary to consider the judgment of the Russian court to evaluate the wife’s submission that the husband acted unconscionably by securing relief based on misrepresentation to the Russian court of material facts regarding his ability to access justice in this jurisdiction.[114]The findings of the Russian court on the husband’s ability to participate in proceedings in this jurisdiction were based on its conclusion that “As a general rule, the personal attendance of the parties at court hearings in family cases in the UK is mandatory” (emphasis added). This is an accurate description of the domestic position. The wife did not seek to dispute before this court the account contained in the husband’s written submission to the Russian court that she had conceded that “as a general rule, personal attendance is mandatory in family proceedings before English courts”. The husband’s written submissions to the Russian court also referred the Russian court to FPR 2010 r.27.3, which provides that unless the court directs otherwise, a party shall attend a hearing. Whilst the wife contends that the husband did not indicate he could attend these proceedings by way of video link (and the husband’s written submission in reply referred only to the decision of the Upper Tribunal in Potanin v Charity Commission for England & Wales and its decision not to permit the husband to give evidence by way of video link), the wife’s Cassation Appeal makes clear that she placed this fact before the Russian court during the anti-suit proceedings. The question of personal attendance or attendance by video link does not feature in the decision of the Russian court to grant anti-suit relief. The Russian court based its decision on its general conclusion that, as it saw it, “the application of restrictive measures in itself already creates obstacles for the Russian party in accessing justice.”[115]The wife further asserts that the husband misled the Russian court by asserting that he had difficulty in obtaining legal representation notwithstanding that he has spent circa £7.5M on these proceedings alone. However, the husband’s written submissions to the Russian court stating that “as a general rule” sanctions apply to payment for legal services, that his lawyers refused to represent him until an OFSI licence was granted, that the OFSI does grant licences, subject to conditions, to allow English lawyers to provide legal services and that he had been granted such a licence, are an accurate account of the general position. The husband’s submission relied on the fact that the obligation to obtain licences subject to conditions has been held by the Russian courts to amount to an obstacle to access to justice. The wife’s Cassation Appeal makes clear that she placed the fact of the husband’s ability to pay for legal representation in these proceedings before the Russian court during the anti-suit proceedings. In rendering its decision, the Russian court relied on the disparate position generally, as it saw it, between the parties created by only the husband being the subject of sanctions.[116]Whilst the wife contends that the Russian court was, in any event, wrong to conclude that the general fact of the imposition of sanctions on the husband is sufficient to demonstrate that access to justice is restricted, that was a matter for the Russian court, and one on which the wife had the opportunity to make submissions and which she has the opportunity to argue on appeal. The fact that the Russian court reached this conclusion, and found in favour of the husband, is not of itself evidence of unconscionable or vexatious and oppressive behaviour on the part of the husband.[117]I am satisfied that the matters prayed in aid by the wife regarding the husband’s presentation of his case to the Russian court are not sufficient to meet the high standard the wife must to demonstrate that the husband’s conduct in seeking and obtaining an anti-suit injunction from the Russian court constituted unconscionable or vexatious and oppressive behaviour.[118]The wife’s final contention regarding unconscionable or vexatious and oppressive behaviour is that the penalties under the Russian anti-suit injunction alone are unconscionable, in circumstances where they range up to the value of the wife’s claim of US$5 billion and have been recognised by courts in this jurisdiction as disproportionate, relying on Magomedov & others v. PJSC Transneft & others at [116].[119]I accept Mr Lowenstein and Mr Du’s submission that caution is required before extrapolating unconscionability (expressed by them as arbitrariness and disproportionality) from the maximum size of the penalty in this case. It is indeed the case that a potential maximum penalty of US$5 billion results from the application of a statutory penalty to the very large claim in this case. However, in determining whether a penalty is unconscionable, figures are not particularly helpful. Rather, the question is whether a penalty that has the potential to amount to the full value of a given claim is unconscionable. I am satisfied the court cannot reach that conclusion on the evidence before it.[120]First, the court is dealing with foreign legislation and should be very slow to pronounce on the probity of the legislation passed by another State. It is a matter for that State as to how, in the present context, it seeks to ensure that orders of its courts are complied with and the severity or otherwise of the penalties for non-compliance. This court heard no detailed arguments regarding the extent to which a penalty up to the full value of the claim in question might contravene public policy in this jurisdiction.[121]Second, and to the extent it is proper for this court to engage in an evaluation of Russian legislation, there is no evidence to suggest that the penalty for breach of the terms of the Russian anti-suit injunction is arbitrary in nature. I accept the submission that the penal element of the Russian anti-suit injunction cannot on the face of it be characterised as an arbitrary, open ended penalty when the penal element is spelled out with certainty in the Russian statute, is subject to a right of appeal and has an apparently clear purpose (to penalise the non-compliance with the order and reflect the degree of seriousness with which the Russian court treats such breaches).[122]With respect to the wife’s reliance on the conclusion of Bright J in Magomedov & others v. PJSC Transneft & others at [116], I am satisfied that that authority does not assist the wife on this point. Read in its proper context, it is plain that Bright J was not making a finding as to the proportionality of penalties that have the potential to encompass the total value of the claim per se. Rather, Bright J was concerned with the question of whether, on the facts of that case, it was proportionate to discharge the injunction as a result of the Claimant’s non-deliberate, non-intentional failure to comply with the duty of candour, where the consequence of discharge on that basis would have been to expose the Claimant to a penalty of up to US$7.5 billion for non-deliberate, non-intentional conduct.[123]I remind myself that the terms ‘vexatious’ and ‘oppressive’ are not to be taken as limiting definitions and that English law has refrained from giving a comprehensive or limiting definition of unconscionability. However, for the reasons set out above, I am not satisfied that the matters relied on by the wife demonstrate to a high standard that the husband’s conduct in seeking and obtaining anti-suit relief in Russia on 18 May 2026 is properly characterised as unconscionable or vexatious and oppressive behaviour on his part.

The ends of justice

[124]The operative principle governing the wife’s application is the ends of justice. In the circumstances, it is important for the court to step back and consider the overall justice of the matter. In doing so, account must be taken not only of injustice to the wife if the husband is allowed to benefit from the foreign proceedings in Russia (the wife being thereby prevented from pursuing a Part III claim that she has litigated for over seven years in this jurisdiction), but also of injustice to the husband if he is not allowed to do so (the husband being prevented from benefiting from relief granted to him under the law of the State of his nationality and domicile). Having stepped back and considered the overall justice of the matter, in the absence of unconscionable or vexatious and oppressive behaviour I am not satisfied that there are any other factors that drive the court to equity, such that not to grant the wife’s application would be contrary to equity and good conscience. Indeed, there are matters that tend somewhat against the granting of equitable relief on the wife’s application.[125]The wife delayed in seeking equitable relief once she became aware of the husband’s intention to apply for an anti-suit injunction in Russia. She waited nearly four months to issue her current application after being put on notice of the Russian proceedings by the husband, two weeks of which followed the grant of the anti-suit order by the Russian court. At the point she issued her application, the wife had already engaged fully with the anti-suit proceedings in the Russian court. She resisted the application with the benefit of legal representation and, having argued the matter, was unsuccessful. Amongst the reasons given by the Russian court was that the wife’s assertion that the timing of the husband’s application was evidence of “bad faith” was not made out. Only after she had engaged fully in the anti-suit proceedings in the jurisdiction of Russia, and lost, did the wife seek an equitable remedy in England to shield her from the consequences of that loss.[126]In light of the conclusions set out above, it is not necessary for me to go on to consider the competing submissions on the extent to which the duty of candour was complied with when the matter came before Lieven J without notice.

CONCLUSION

[127]For the detailed reasons set out above, the wife has not satisfied the court to a high standard commensurate with the granting of final injunctive relief that the anti-anti-suit injunction, the anti-enforcement injunction and the anti-reliance injunction should continue and her application must accordingly be refused. I am not satisfied that the wife has given the court a high level of assurance that the mandatory injunction requiring the husband to keep her apprised on developments in the Russian proceedings is rightly made. The wife is an appellant in those proceedings and is represented. In such circumstances, a mandatory order is unnecessary and would be unduly onerous. In light of the conclusions set out above, I am not prepared to grant the consequential declarations sought by the wife.[128]I will ask leading and junior counsel to draw an order accordingly. The court will permit a stay of execution with the effect that the injunctions granted by Lieven J will continue for a period of 21 days to allow the wife time to make any application for permission to appeal to the Court of Appeal.