“The States signatory to the present Convention, Firmly convinced that the interests of children are of paramount importance in matters relating to their custody, Desiring to protect children internationally from the harmful effects of their wrongful removal or retention and to establish procedures to ensure their prompt return to the State of their habitual residence, as well as to secure protection for rights of access, Have resolved to conclude a Convention to this effect, and have agreed upon the following provisions.”
“The objects of the present Convention are – (a) to secure the prompt return of children wrongfully removed to or retained in any Contracting State; and (b) to ensure that rights of custody and of access under the law of one Contracting State are effectively respected in the other Contracting States.”
“The removal or the retention of a child is to be considered wrongful where – (a) it is in breach of rights of custody attributed to a person, an institution or any other body, either jointly or alone, under the law of the State in which the child was habitually resident immediately before the removal or retention; and (b) at the time of removal or retention those rights were actually exercised, either jointly or alone, or would have been so exercised but for the removal or retention. ….”
“(1) Where a child has been wrongfully removed or retained in terms of Article 3 and, at the date of the commencement of the proceedings before the judicial or administrative authority of the Contracting State where the child is, a period of less than one year has elapsed from the date of the wrongful removal or retention, the authority concerned shall order the return of the child forthwith. (2) The judicial or administrative authority, even where the proceedings have been commenced after the expiration of the period of one year referred to in the preceding paragraph, shall also order the return of the child, unless it is demonstrated that the child is now settled in its new environment….”
“Notwithstanding the provisions of the preceding Article, the judicial or administrative authority of the requested State is not bound to order the return of the child if the person, institution or other body which opposes its return establishes that … (b) there is a grave risk that his or her return would expose the child to physical or psychological harm or otherwise place the child in an intolerable situation.”
“16. The Convention's objects, which appear in Article 1, can be summarized as follows: since one factor characteristic of the situations under consideration consists in the fact that the abductor claims that his action has been rendered lawful by the competent authorities of the State of refuge, one effective way of deterring him would be to deprive his actions of any practical or juridical consequences. The Convention, in order to bring this about, places at the head of its objectives the restoration of the status quo, by means of 'the prompt return of children wrongfully removed to or retained in any Contracting State'…. 17. Besides, although the object stated in sub-paragraph b, 'to ensure that rights of custody and of access under the law” of one Contracting State are effectively respected in the other Contracting States' appears to stand by itself, its teleological connection with the 'return of the child' object is no less evident. I n reality, it can be regarded as one single object considered at two different times; whilst the prompt return of the child answers to the desire to re-establish a situation unilaterally and forcibly altered by the abductor, effective respect for rights of custody and of access belongs on the preventive level, in so far as it must lead to the disappearance of one of the most frequent causes of child abductions.”
“23. … the dispositive part of the Convention contains no explicit reference to the interests of the child to the extent of their qualifying the Convention's stated object, which is to secure the prompt return of children who have been wrongfully removed or retained. However, its silence on this point ought not to lead one to the conclusion that the Convention ignores the social paradigm which declares the necessity of considering the interests of children in regulating all the problems which concern them. On the contrary, right from the start the signatory States declare themselves to be 'firmly convinced that the interests of children are of paramount importance in matters relating to their custody'; it is precisely because of this conviction that they drew up the Convention, 'desiring to protect children internationally from the harmful effects of their wrongful removal or retention'. 24. These two paragraphs in the preamble reflect quite clearly the philosophy of the Convention in this regard. It can be defined as follows: the struggle against the great increase in international child abductions must always be inspired by the desire to protect children and should be based upon an interpretation of their true interests. Now, the right not to be removed or retained in the name of more or less arguable rights concerning its person is one of the most objective examples of what constitutes the interests of the child…. 25. It is thus legitimate to assert that the two objects of the Convention — the one preventive, the other designed to secure the immediate reintegration of the child into its habitual environment — both correspond to a specific idea of what constitutes the 'best interests of the child'. However, even when viewing from this perspective, it has to be admitted that the removal of the child can sometimes be justified by objective reasons which have to do either with its person, or with the environment with which it is most closely connected. Therefore the Convention recognizes the need for certain exceptions to the general obligations assumed by States to secure the prompt return of children who have been unlawfully removed or retained. For the most part, these exceptions are only concrete illustrations of the overly vague principle whereby the interests of the child are stated to be the guiding criterion in this area.”
“107. In the first paragraph, the article brings a unique solution to bear upon the problem of determining the period during which the authorities concerned must order the return of the child forthwith. The problem is an important one since, in so far as the return of the child is regarded as being in its interests, it is clear that after a child has become settled in its new environment, its return should take place only after an examination of the merits of the custody rights exercised over it — something which is outside the scope of the Convention. Now, the difficulties encountered in any attempt to state this test of 'integration of the child' as an objective rule resulted in a time-limit being fixed which, although perhaps arbitrary, nevertheless proved to be the 'least bad' answer to the concerns which were voiced in this regard. … 109. The second paragraph answered to the need, felt strongly throughout the preliminary proceedings, to lessen the consequences which would flow from the adoption of an inflexible time-limit beyond which the provisions of the Convention could not be invoked. The solution finally adopted plainly extends the Convention's scope by maintaining indefinitely a real obligation to return the child. In any event, it cannot be denied that such an obligation disappears whenever it can be shown that 'the child is now settled in its new environment'. The provision does not state how this fact is to be proved, but it would seem logical to regard such a task as falling upon the abductor or upon the person who opposes the return of the child, whilst at the same time preserving the contingent discretionary power of internal authorities in this regard. In any case, the proof or verification of a child's establishment in a new environment opens up the possibility of longer proceedings than those envisaged in the first paragraph. Finally, and as much for these reasons as for the fact that the return will, in the very nature of things, always occur much later than one year after the abduction, the Convention does not speak in this context of return 'forthwith' but merely of return.”
“what is the degree of settlement which has to be demonstrated? There is some force, I find, in the argument that legal presumptions reflect the norm, and the presumption under the Convention is that children should be returned unless the mother can establish the degree of settlement which is more than mere adjustment to surroundings. I find that word should be given its ordinary natural meaning, and that the word ‘settled’ in this context has two constituents. First, it involves a physical element of relating to, being established in, a community and an environment. Secondly, I find that it has an emotional constituent denoting security and stability.”
“The word 'new' is significant, and in my judgment it must encompass place, home, school, people, friends, activities and opportunities, but not, per se, the relationship with the mother, which has always existed in a close, loving attachment. That can only be relevant insofar as it impinges on the new surroundings.”
“The phrase 'long-term' was not defined, but I find that it is the opposite of 'transient'; it requires a demonstration by a projection into the future, that the present position imports stability when looking at the future, and is permanent in so far as anything in life can be said to be permanent.”
“(i) The proceedings must be commenced within one year of the abduction. The making of a complaint to police or an application to a Central Authority does not suffice. (ii) The focus must be on the child. Settlement must be considered from the child’s perspective, not the adult’s. The date for the assessment is that date of the commencement of proceedings not the date of the hearing. This is aimed at preventing settlement being achieved by delay in the process. (iii) Settlement involves both physical and emotional or psychological components. Physically, it involves being established or integrated into an environment compromising a home and school, a social and family network, activities, opportunities. Emotional or psychological settlement connotes security and stability within that environment. It is more than mere adjustment to present surroundings. (iv) Concealment and delay may be relevant to establishing settlement. Concealment is likely to undermine settlement. Living openly is likely to permit greater settlement. The absence of a relationship with a left behind parent will be an important consideration in determining whether a child is settled. (v) A broad and purposive construction will properly reflect the facts of each case – it does not require a 2 stage approach but must, to use a probably over-used expression involve a holistic assessment of whether the child is settled in its new environment. It has to be kept in mind that the settlement exception is intended to reflect welfare. The Article 12 settlement exception of all the exceptions is most welfare focused. The underlying purpose of the exception is to enable the court in furtherance of the welfare of the child to decline a summary return because imposing a summary return (i.e. without a more detailed consideration of welfare) might compound the harm caused by the original abduction by uprooting a child summarily from his by now familiar environment.”
“…there is clearly a degree of overlap between the concepts of settlement and habitual residence. Settlement does not require a complete settlement, any more than habitual residence requires full integration. Settlement is plainly an evaluation which is, to some degree, subjective. There will be a spectrum ranging from the obviously and completely settled to the very unsettled. In between there are many possibilities.”
“In the same way that habitual residence does not require complete integration or permanence so settlement does not necessarily require that the child is fully settled or views their situation as permanent.”
“In common with Williams J in Re B (A Child)[2018] EWHC 1643 (Fam) and Robert Peel QC (as he then was) in AX v CY (Article 12 Settlement)[2020] EWHC 1599 (Fam) [2020] 2 FLR 1257 , I consider that the question of settlement should be considered 'holistically', not in stages. The court must take into account all of the relevant circumstances bearing in mind that within the confines of a summary process the picture is likely to be incomplete. Information about the child's circumstances prior to an abduction can be relevant to the issue. The court's primary focus is on the question of whether settlement has been achieved 'in a new environment' as opposed to with the abducting parent. Concealment and deceit are highly relevant to the issue, but not determinative. The severance of a pre-existing parental relationship is also very relevant, but again not determinative … The court must consider whether the child has become established in a new environment on a permanent or long-term, as opposed to transient, basis: Re N.”
“I have reached the conclusion, not without considerable hesitation, that article 12 does envisage that a settled child might nevertheless be returned within the Convention procedures. The words "shall...unless" leave the matter open. It would be consistent with all the other exceptions to the rule of return. It would avoid the separate and perhaps unfunded need for proceedings in the unusual event that summary return would be appropriate in a settlement case. It recognises the flexibility in the concept of settlement, which may arise in a wide variety of circumstances and to very different degrees. It acknowledges that late application may be the result of active concealment of where the child has gone. It leaves the court with all options open.”
“43. My Lords, in cases where a discretion arises from the terms of the Convention itself, it seems to me that the discretion is at large. The court is entitled to take into account the various aspects of the Convention policy, alongside the circumstances which gave the court a discretion in the first place and the wider considerations of the child's rights and welfare …. 44. ….The underlying purpose is to protect the interests of children by securing the swift return of those who have been wrongfully removed or retained. The Convention itself has defined when a child must be returned and when she need not be. Thereafter the weight to be given to Convention considerations and to the interests of the child will vary enormously. The extent to which it will be appropriate to investigate those welfare considerations will also vary. But the further away one gets from the speedy return envisaged by the Convention, the less weighty those general Convention considerations must be. … 47. In settlement cases, it must be borne in mind that the major objective of the Convention cannot be achieved. These are no longer "hot pursuit" cases. By definition, for whatever reason, the pursuit did not begin until long after the trail had gone cold. The object of securing a swift return to the country of origin cannot be met. It cannot any longer be assumed that that country is the better forum for the resolution of the parental dispute. So the policy of the Convention would not necessarily point towards a return in such cases, quite apart from the comparative strength of the countervailing factors, which may well, as here, include the child's objections as well as her integration in her new community.”
“(1) The terms of Article 13(b) are by their very nature restricted in their scope. The defence has a high threshold, demonstrated by the use of the words "grave" and "intolerable". (2) The focus is on the child. The issue is the risk to the child in the event of his or her return. (3) The separation of the child from the abducting parent can establish the required grave risk. (4) When the allegations on which the abducting parent relies to establish grave risk are disputed, the court should first establish whether, if they are true, there would be a grave risk that the child would be exposed to physical or psychological harm or otherwise placed in an intolerable situation. If so, the court must then establish how the child can be protected from the risk. (5) In assessing these matters, the court must be mindful of the limitations involved in the summary nature of the Hague process. It will rarely be appropriate to hear oral evidence of the allegations made under Article 13(b) and so neither the allegations nor their rebuttal are usually tested in cross-examination. (6) That does not mean, however, that no evaluative assessment of the allegations should be undertaken by the court. The court must examine in concrete terms the situation in which the child would be on return. In analysing whether the allegations are of sufficient detail and substance to give rise to the grave risk, the judge will have to consider whether the evidence enables him or her confidently to discount the possibility that they do. (7) If the judge concludes that the allegations would potentially establish the existence of an Article 13(b) risk, he or she must then carefully consider whether and how the risk can be addressed or sufficiently ameliorated so that the child will not be exposed to the risk. (8) In many cases, sufficient protection will be afforded by extracting undertakings from the applicant as to the conditions in which the child will live when he returns and by relying on the courts of the requesting State to protect him once he is there. (9) In deciding what weight can be placed on undertakings, the court has to take into account the extent to which they are likely to be effective, both in terms of compliance and in terms of the consequences, including remedies for enforcement in the requesting State, in the absence of compliance. (10) As has been made clear by the Practice Guidance on "Case Management and Mediation of International Child Abduction Proceedings" issued by the President of the Family Division on13 March 2018 , the question of specific protective measures must be addressed at the earliest opportunity, including by obtaining information as to the protective measures that are available, or could be put in place, to meet the alleged identified risks.”
“i) The court must examine in concrete terms the situation that would face a child on a return being ordered. If the court considers that it has insufficient information to answer these questions, it should adjourn the hearing to enable more detailed evidence to be obtained. ii) In deciding what weight can be placed on undertakings as a protective measure, the court has to take into account the extent to which they are likely to be effective both in terms of compliance and in terms of the consequences, including remedies, in the absence of compliance. iii) The issue is the effectiveness of the undertaking in question as a protective measure, which issue is not confined solely to the enforceability of the undertaking. iv) There is a need for caution when relying on undertakings as a protective measure and there should not be a too ready acceptance of undertakings which are not enforceable in the courts of the requesting State. v) There is a distinction to be drawn between the practical arrangements for the child's return and measures designed or relied on to protect the children from an Art 13(b) risk. The efficacy of the latter will need to be addressed with care. vi) The more weight placed by the court on the protective nature of the measures in question when determining the application, the greater the scrutiny required in respect of their efficacy.”
“With respect to undertakings, what is therefore required is not simply an indication of what undertakings are offered by the left behind parent as protective measures, but sufficient evidence as to extent to which those undertakings will be effective in providing the protection they are offered up to provide.”
“52. Determining defences in Hague Convention proceedings, is a matter of fact to be established by the trial judge. The court may be assisted by the factors identified observed during my assessment, some of which point towards B being somewhat settled in [this country]. She has spent a notable amount of time living in her current home and neighbourhood and is part of a local community of friends and neighbours. She has access to healthcare and has started attending nursery, albeit very recently. There is a pattern to daily life to which she has become accustomed, which includes spending time with her maternal family and the involvement of her father in her life, despite the distance he lives from B. 53. Comparatively, what B has been told by her parents about what to expect from her future is contested, but to my mind is instrumental in establishing the extent to which she is emotionally and psychologically settled in this country. If B has been led to believe that she would be returning to Portugal, it is difficult to imagine that she has been able to consider her current home a permanent one until very recently.”
“(a) whether B is now settled in her new environment in accordance with Article 12; (b) whether a return order would expose B to a grave risk of physical or psychological harm or otherwise place her in an intolerable situation contrary to Article 13(b). I am asked to consider a range of possible protective measures; and (c) if either or both of the ‘exceptions’ or ‘defences’ are established whether I should exercise my discretion to order a return.”
“29. The facts of this case are unusual. F has travelled to this country on 33 occasions since December 2022 to spend time with B. M has also travelled back to Portugal with B on six occasions, the longest period of time being for three and a half months from6 December 2023 until1 March 2024 with a further extended period in Portugal from28 September 2024 until9 November 2024 . B has homes with both parties in both countries. On Mr. Gupta and Ms. Gaunt’s analysis M has spent approximately 39% of her life in Portugal. 30. It is no doubt as a result of this travel between the two countries that it is common ground that B has a close relationship with both of her parents. I was particularly struck by the following references in the Cafcass Report: ‘[24] … I did not observe any tension or vigilance from [B] towards her parents during the handover. This suggests that she is used to calm and civil exchanges and does not feel anxious about being in both parents’ presence. This is in sharp contrast to many children of separated parents who are frequently uneasy and fearful about interactions between their parents. [25] … She presents as a child who has her parents’ emotional permission to enjoy the time she spends with the other, as well as to share any worries about this. This suggests that [B’s] parents each positively promote her relationship with the other.’” ‘[24] … I did not observe any tension or vigilance from [B] towards her parents during the handover. This suggests that she is used to calm and civil exchanges and does not feel anxious about being in both parents’ presence. This is in sharp contrast to many children of separated parents who are frequently uneasy and fearful about interactions between their parents. [25] … She presents as a child who has her parents’ emotional permission to enjoy the time she spends with the other, as well as to share any worries about this. This suggests that [B’s] parents each positively promote her relationship with the other.’”
“54. I agree with Mr. Gupta and Ms. Gaunt when they say in their Position Statement at paragraph 19 that Ms. Veitch’s Cafcass Report is balanced and leaves the question open for the court. I further agree that the report does not lean towards a conclusion that B is settled, only going as far as to say at paragraph 41 that there are factors which support that B [emphasis added by judge] ‘is becoming physically settled’ in this country – living in the same house for 23 months and regarding it as her home, knowing her neighbours and having become part of the local community, being familiar with the local area, having developed a close friendship with a particular local child and living near her maternal family - and at paragraph 53 that ‘some’ factors ‘point towards [B] being somewhat settled in [this country]’. 55. In my judgment B is not settled in this jurisdiction. In reaching this conclusion I agree with Ms. Veitch at paragraph 53 of her report that “what [B] has been told by her parents about what to expect from her future is contested, but to my mind is instrumental in establishing the extent to which she is emotionally and psychologically settled in [this country]. If [B] has been led to believe that she would be returning to Portugal, it is difficult to imagine that she has been able to consider her current home a permanent one until very recently”. 56. There is no doubt that M had not communicated to F an unequivocal intention permanently to reside in this jurisdiction with B until recently. This is clear from: (a) the two lengthy periods of mediation between the parties between December 2022 and March/May 2023 and between August 2023 and December 2023/January 2024. Mediation would not have taken place if M had informed F of an intention permanently to reside in the jurisdiction as otherwise F would have issued proceedings earlier … (b) the many WhatsApp messages and emails sent by M to F between October 2022 …. These record M repeatedly informing F she had no intention of staying in this country long-term and/or that she and B would be moving back to Portugal; and (c) the written agreement signed by both parties on15th October 2024 , reached after several months of discussion and negotiation, and which stated B would return to live in Portugal from January 2025. 57. On F’s behalf it is said what M said to F is also likely to be what was understood by B to be the case. I consider the position is more nuanced than this…. 58. …B has either (i) received a consistent message from both parents that she may (if not will) be returning to Portugal in which case she will understand her current situation is or may be a temporary one; or (ii) she has received different messages from each of her parents, in which case she is likely to feel a sense of confusion. Either way, B has not received a clear and consistent message that this country is and will be her permanent home. I agree that B will therefore feel ‘in limbo’ and in my view cannot as a consequence have a sense of physical, psychological and emotional settlement here (as distinct from her feeling settled with M)…. 59. In this context I accept F’s evidence at paragraph 5 of his Statement of2nd May 2025 that B has said to him “when am I going to Portugal?” … 60. B’s young age is also a relevant factor in this analysis: she is not in full-time education and is not of an age to have established close ties with anyone but her parents. As set out above it is common ground that her young age means that she will derive her sense of emotional and psychological settlement from her relationship with her parents more than from any particular location. Further, as Ms. Veitch stated at paragraph 15 of her report, B “has yet to establish friendships at nursery.” 61. I also conclude a lack of settlement in this country will have been compounded by B’s six visits to Portugal (one of which was three and a half months long) and visiting F’s home in Portugal…. 62. As was submitted on F’s behalf, the factors which would in theory point towards B being settled in this jurisdiction are that she has resided in the same property for 23 months, has developed some connections within the community and is living close to members of her maternal family. This does not constitute the requisite physical integration and stability for the purposes of Article 12, particularly when there are also properties in Portugal which B considers to be home, and has many friendships and family there with whom she has a close connection and has maintained a relationship with physically when in Portugal and remotely when in this country. 63. I also conclude from M’s WhatsApp messages and her emails to F that she herself had not considered remaining in this jurisdiction to be a long-term stable arrangement until relatively recently. …. I am satisfied that given the length of time over which these messages were sent they were genuine. I accept it is likely that B will have picked up on M’s lack of settlement. In any event it cannot be that B has become settled when M is not. 64. Ms. Guha submitted orally that from the time M arrived in this country she “knew in her heart she wanted to stay”
“although I acknowledge the grant of a permit is discretionary I am satisfied that on balance M will be able to formalise her right of residence in Portugal. I therefore do not consider that this issue weighs with any great significance in the balance.”
“while a return may have a cumulative impact on M’s wellbeing, there is no clear evidence that it would have such a detrimental impact on B and in particular M’s ability to parent her, especially when compared to the very significant impact on B of not being able to enjoy such regular time with F. I therefore do not consider that this evidence weighs significantly in the balance.”
“a party should be allowed to enter mediation and/or use other forms of non-court dispute resolution without fear that the time taken in seeking to resolve matters outside of court may be used against them (whether as part of the defence of settlement or otherwise) should resolution in a non-court forum not ultimately be achieved and court proceedings thereafter issued. It would be contrary to the court’s “duty” pursuant to FPR 2010 Part 3 to consider non-court dispute resolution and likewise contrary to the overriding objective pursuant to FPR Part 1 to deal with cases “justly” if a court acceded to a submission made by a respondent to an application for summary return that the merits of a settlement defence and/or the arguments in relation to the non-exercise of the discretion were strengthened because court proceedings were not issued earlier when this was because the parties were engaged in non-court dispute resolution.”
“87. I accept that as stated in Re M (Zimbabwe) the further away one gets from a speedy return envisaged by the Convention, the less weighty its objectives are. 88. However, taking all the foregoing into account, and my view that it is inherently unlikely to be feasible for F to be able to continue to travel to this jurisdiction as frequently as he has done so far for an indefinite period, if I had reached the conclusion that B was settled in this country, then on the (very) unusual facts of this case – and which include that (i) it is common ground that B benefits greatly from her relationship with F; and (ii) she already has a home in Portugal with both of her parents - I would have exercised my discretion to order her return to Portugal ….”
“(i) Not to support or instigate any criminal or civil proceedings for the punishment of the respondent arising out of the removal of the child from country and the subsequent retention of the child in England and Wales; (ii) Not to use or threaten abuse against the respondent, nor encourage anyone else to use or threaten abuse against the respondent; (iii) Not to attend at the airport when the respondent and the child land in Portugal; (iv) Not to remove the child from the respondent’s care, save for the purpose of any agreed contact between the parties or ordered by the Portuguese court; (v) To pay for economy tickets for the respondent and the child to return to Portugal (to include one hold-luggage suitcase each); (vi) Commencing on15 July 2025 , to pay€800 to the respondent per month as financial support, to be paid in monthly instalments directly to the respondent’s bank account, for a maximum period of 1 year or until the respondent obtains a residence permit for Portugal, whichever is sooner; (vii) In the event that the respondent confirms that she wishes to reside in the property of the applicant’s cousin … (instead of the property she is currently renting …), the applicant shall fund the same for a maximum period of 1 year or until the respondent obtains a residence permit for Portugal, whichever is sooner, and to make payment of the deposit and the first month’s rent prior to the respondent’s return to Portugal; (viii) To provide the respondent with a car for a maximum period of 1 year or until the respondent obtains a residence permit for Portugal, whichever is sooner. The applicant will make necessary arrangements for the car to be waiting for the respondent on the date of the arrival in Portugal; (ix) Not to enforce the bill sent to the respondent in 2024 of c.€3,500 nor seek to offset any/all of the same against the sums owed for maintenance and accommodation; (x) To meet the costs (if any) of the respondent’s legal representation in respect of her application for a residence permit in Portugal, up to a maximum of€3,000 , and to pay those costs directly to the lawyer. The applicant will make such payments as necessary prior to30 June 2025 ; (xi) To apply for a court welfare hearing in respect of the child as soon as possible after her return; (xii) Not to attend the respondent’s place of residence without prior agreement; (xiii) To contribute towards any nursery fees in relation to any nursery that the applicant and respondent agree on; and (xiv) To fund health insurance for the respondent and the child for 1 year with the premium paid directly to the provider, with the respondent to provide proof of that policy having been taken out and funded before the child’s return.”
“I am satisfied that this is a case where F can be trusted as he is mindful of the need for B to have the benefit of a safe and secure environment and of the importance of M having the same in order to be able to meet B’s needs.”
“My acceptance of F’s undertakings (which constitute ‘measures’ for the purpose of Article 23 of the Hague Convention 1996 and are therefore recognisable by operation of law in Portugal) will therefore be sufficient protection. I am satisfied on the facts of this case that this satisfies the need for the protective measures to be effective (which is not confined solely to the issue of enforceability).”
“There is a need for caution when relying on undertakings as a protective measure, and undertakings that are not enforceable in the courts of the requesting State should not be too readily accepted. There is a distinction to be drawn between the practical arrangements for the child’s return and measures designed or relied on to protect the child. The efficacy of the latter will need to be addressed with care.”