“The power … is one which had historical origins in the English legal system and the relationships which once existed between various different courts and the limited remedies which they were variously able to grant. It had however been recognisably 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. … … When an English court makes a restraining order, it is making an order which is addressed only to a party which is before it. The order is not directed against the foreign court: Lord Goff of Chieveley, Société Nationale Industrielle Aérospatiale v Lee Kui Jak [1987] A.C. 871, 892. The order binds only that party, in personam, and is effective only in so far as that party is amenable to the jurisdiction of the English courts so that the order can be enforced against him: ‘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.’ ”
“… A right to obtain an interlocutory injunction is not a cause of action. It cannot stand on its own. It is dependent upon there being a pre-existing cause of action against the defendant arising out of an invasion, actual or threatened by him, of a legal or equitable right of the plaintiff for the enforcement of which the defendant is amenable to the jurisdiction of the court. The right to obtain an interlocutory injunction is merely ancillary and incidental to the pre-existing cause of action. It is granted to preserve the status quo pending the ascertainment by the court of the rights of the parties and the grant to the plaintiff of the relief to which his cause of action entitles him, which may or may not include a final injunction. Since the transfer to the Supreme Court of Judicature of all the jurisdiction previously exercised by the court of chancery and the courts of common law, the power of the High Court to grant interlocutory injunctions has been regulated by statute. That the High Court has no power to grant an interlocutory injunction except in protection or assertion of some legal or equitable right which it has jurisdiction to enforce by final judgment, was first laid down in the classic judgment of Cotton L.J. in North London Railway Co. v. Great Northern Railway Co. (1883) 11 Q.B.D. 30, 39-40, which has been consistently followed ever since.”
“I am reluctant to accept the proposition that the power of the court to grant injunctions is restricted to certain exclusive categories. That power is unfettered by statute; and it is impossible for us now to foresee every circumstance in which it may be thought right to make the remedy available.”
“The considerable case law to which your Lordships have been referred does not, in terms, express any limitation upon the sort of cases in which it may be appropriate to exercise the jurisdiction. Counsel for the plaintiff however, submitted that it is to be found to have been exercised only in two classes of case: (1) ‘lis alibi pendens,’ where the object is to prevent harassment: he cited as examples The Christiansborg (1885) 10 P.D. 141, with especial reference to the judgment of Baggallay L.J. at pp. 152-153, The Hagen [1908] P. 189, 2002 and The Janera[1928] P 55 : and (2) where there is a right justiciable in England, which the court seeks to protect.” and, after referring to The Siskina, Lord Scarman said: “No doubt, in practice, most cases fall within one or other of these two classes. But the width and flexibility of equity are not to be undermined by categorisation. Caution in the exercise of the jurisdiction is certainly needed: but the way in which the judges have expressed themselves from 1821 onwards amply supports the view for which the defendants contend that the injunction can be granted against a party properly before the court, where it is appropriate to avoid injustice.”
“This, being said in the context of an application for a Mareva injunction, omitted to mention the type of case that is of comparatively rare occurrence in the English courts in which the plaintiff seeks against a person amenable to the jurisdiction of the English High Court an injunction to restrain the defendant from bringing suit against him in a foreign court upon the ground that the plaintiff is entitled under English law to a legal or equitable right not to be sued in that foreign court by that person upon the cause of action that is the subject of such proceedings. A right not to be sued upon a particular cause of action in a particular foreign court by the person against whom the injunction is sought may be contractual in origin. A common example of this is an exclusive jurisdiction clause in a contract. Furthermore, if under English law a defence would be available to the injunction-seeker, that defence may be given anticipatory effect as a right not to be sued that is enforceable by injunction in an action for a declaration of non-liability. Of such defences it is not difficult to point to a number of examples most of them equitable in historical origin, such as estoppel in pais (which was also a defence at common law), promissory estoppel, election, waiver, standing by, laches, blowing hot and cold - to all of which the generic description of conduct that is ‘unconscionable’ in the eye of English law may be given. I would accordingly agree, as I did in Castanho’s case [1981] A.C. 557, with the qualification to the statement of principle in the stark terms in which I expressed it in the Siskina case [1979] A.C. 210, 256 that was added by Lord Scarman in Castanho’s case …”
“It is difficult, and would probably be unwise, to seek to define the expression ‘unconscionable conduct’ in anything like an exhaustive manner. In my opinion, however, it includes, at any rate, conduct which is oppressive or vexatious or which interferes with the due process of the court.”
“… The first basic principle is that the power of the High Court to grant injunctions is a statutory power conferred on it bysection 37(1) of the Supreme Court Act 1981 , which provides that ‘the High Court may by order (whether interlocutory or final) grant an injunction in all cases in which it appears to the court to be just and convenient to do so.’ … The second basic principle is that, although the terms ofsection 37(1) of the Act of 1981 and its predecessors are very wide, the power conferred by them has been circumscribed by judicial authority dating back many years. … The effect of these authorities [The Siskina, Castanho v Brown & Root (UK) Ltd, and British Airways Board v Laker Airways Ltd], so far as material to the present case, can be summarised by saying that the power of the High Court to grant injunctions is, subject to two exceptions to which I shall refer shortly, limited to two situations. Situation (1) is when one party to an action can show that the other party has either invaded, or threatens to invade, a legal or equitable right of the former for the enforcement of which the latter is amenable to the jurisdiction of the court. Situation (2) is where one party to an action has behaved, or threatens to behave, in a manner which is unconscionable. The third basic principle is that, among the forms of injunction which the High Court has power to grant, is an injunction granted to one party to an action to restrain the other party to it from beginning, or if he has begun from continuing, proceedings against the former in a foreign court. … The latter form of injunction may be granted in such circumstances as to constitute an exception to the second basic principle stated above. This may occur where one party has brought proceedings against another party in a foreign court which is not the forum conveniens for the trial of the dispute between them, as that expression was defined and applied in MacShannon v Rockware Glass Ltd[1978] AC 795 . In such a case the party who has brought the proceedings in the foreign court may not, by doing so, have invaded any legal or equitable right of the other party, nor acted in an unconscionable manner. The court nevertheless has power to restrain him from continuing his foreign proceedings on the ground that there is another forum in which it is more appropriate, in the interests of justice, that the dispute between the parties should be tried. … The power of the court to grant Mareva injunctions may also, before it was statutorily recognised, have been a further exception to the second basic principle stated above. …”
“For my part I find it difficult to identify any legal or equitable rights of Man, apart from their rights under the arbitration clause, which were infringed by Mr. Haryanto when he brought his proceedings in Indonesia, or would be infringed by enforcement proceedings in other jurisdictions. It is sufficient, however, to consider the matter, as did the Judge, on the basis of unconscionability.”
“In my judgment the learned Judge was correct in dismissing legal and equitable rights from his consideration. I turn to behaviour, actual or threatened, in a manner which is unconscionable in English law. ..”
“For instance, a writ may properly be issued containing nothing materially more than a claim for an injunction to restrain a defendant from continuing proceedings abroad on the ground that this would be unconscionable: see British Airways Board v Laker Airways Ltd. [1985] A.C. 58, 81, 95; [1984] Q.B. 142, 147. In such a case, the underlying right, if sought to be identified, can only be defined along the lines that a party has a right not to be sued abroad when that would be unconscionable. This formulation exemplifies the circular nature of the discussion.”
“ … Under English law, a person has no right not to be sued in a particular forum, domestic or foreign, unless there is some specific factor which gives him that right. A contractual arbitration or exclusive jurisdiction clause will provide such a ground for seeking to invoke the right to enforce the clause. The applicant does not have to show that the contractual forum is more appropriate than any other; the parties’ contractual agreement does that for him. Similarly, where as in the present case there has been clearly unconscionable conduct on the part of the party sought to be restrained, this conduct is a sufficiently strong element to support the affected party’s application for an order to restrain such conduct. …”
“… the threatened conduct must be ‘unconscionable’. It is only such conduct which founds the right, legal or equitable … for the protection of which an injunction can be granted.”
“The European Court distinguished between cases in which the court which made the order had jurisdiction over the substance of the case under the Brussels Convention, and those in which it did not. Where the national court had jurisdiction over the substance of the case, the European Court held (paras 19, 21 and 22) that that court also had jurisdiction to order provisional or protective measures, without that jurisdiction being subject to any further conditions, such as that the order must be capable of enforcement in the State where the order is made. The same point is made in [Case C-99/96 Mietz v Intership Yachting SneekBV[1999] ECR I-2277 ] at paras [40]-[41]. It follows that even if CCOG were domiciled in Greece, the English court as the court having jurisdiction to hear the substance of the case would have power to order provisional or protective measures. The effect of these decisions is that the court with jurisdiction over the substance of the case has jurisdiction to grant any ancillary order. There is no reason to doubt that that includes orders both pre-judgment and post-judgment ….”
“The case of the foreign defendant who has not invoked the jurisdiction of these courts, however, is different. In such a case, in the absence of a general submission to the jurisdiction (see … The Kapetan Markos[1986] 1 Lloyd’s Rep 211 at 228-229) the general rule is that permission has to be obtained within the four corners of the English long-arm statute for each separate claim made against him: see Holland v Leslie[1894] 2 QB 346 and Waterhouse v Reid[1938] 1 All ER 235 ,[1938] 1 KB 743 .”
“As it appears that these suits were instituted for the same matter in all respects, and there has been an adjudication upon that matter, from which there may, indeed, be an appeal, but which, for the present, must be considered as final, I think I should not be performing my duty, if I permitted the Plaintiff to go on with the proceedings in Ireland. The injunction prayed by this petition must, therefore, be granted.”
“Even though no decree has been obtained in this country, yet if a suit instituted abroad does not appear so well calculated to answer the ends of justice as the suit here, the Court will restrain the foreign action, imposing, however, terms which it considers reasonable for protecting the party whom it enjoins.”
“…without attempting to cut down the breadth of the jurisdiction, the golden thread running through the rare cases where an injunction has been granted appears to have been the protection of the jurisdiction; an injunction has been granted where it was considered necessary and proper for the protection of the exercise of the jurisdiction of the English court. …”
“… I am at present inclined to the opinion that an injunction has generally been granted in such circumstances for the purpose of protecting the English jurisdiction ...”
“…one of their Lordships has been inclined to think that such an idea generally underlies the jurisdiction to grant injunctions restraining the pursuit of foreign proceedings …”
“… 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.”
“... In my view it would be wrong for this Court to grant an injunction which is designed to take effect inside Indonesia and which would interfere or purport to interfere with the judgment of a court of competent jurisdiction inside that country. ... One can see the force of the argument that Man, having obtained declarations in England, should be entitled to ancillary relief to give teeth to the declarations and to reduce the risk of a multiplicity of proceedings. In the end, however, I have come to the conclusion that it would not be right on the facts of this case to grant any injunction which would have an extraterritorial effect on proceedings abroad.”