"That undue delay and settlement may, in appropriate cases, constitute the basis of an argument that a child would be exposed to an intolerable situation if summarily returned to their country of habitual residence prior to removal is recognised by Baroness Hale of Richmond in Re D (A Child)(Abduction: Custody Rights)[2006] UKHL 51 ,[2007] 1 AC 619 ,[2006] 1 WLR 989 ,[2007] 1 FLR 961 at paras [51]-[53]. In particular I note that the word 'intolerable' in this context should be taken to mean 'a situation in which this particular child in these particular circumstances should not be expected to tolerate'."
"33 Second … the risk to the child must be "grave"
"35 Fourth, article 13(b) is looking to the future: the situation as it would be if the child were to be returned forthwith to her home country. As has often been pointed out, this is not necessarily the same as being returned to the person, institution or other body who has requested her return, although of course it may be so if that person has the right so to demand. More importantly, the situation which the child will face on return depends crucially on the protective measures which can be put in place to secure that the child will not be called upon to face an intolerable situation when she gets home. Mr Turner accepts that if the risk is serious enough to fall within article 13(b) the court is not only concerned with the child's immediate future, because the need for effective protection may persist." 77. In In re S (A Child), the judgment of the court was given by Lord Wilson. The case dealt with the question of whether, in the context of the effect on a parent's mental health for the purpose of Article 13(b), there needed to be an objectively reasonable or realistic risk or whether the parent's subjective perception of the risk could be sufficient. Lord Wilson said: "27 In In re E[2012] 1 AC 144 this court considered the situation in which the anxieties of a respondent mother about a return with the child to the state of habitual residence were not based upon objective risk to her but nevertheless were of such intensity as to be likely, in the event of a return, to destabilize her parenting of the child to the point at which the child's situation would become intolerable. No doubt a court will look very critically at an assertion of intense anxieties not based upon objective risk; and will, among other things, ask itself whether they can be dispelled. But in in re E, it was this court's clear view that such anxieties could in principle found the defence. Thus, at para 34, it recorded, with approval, a concession by Mr Turner QC, who was counsel for the father in that case, that, if there was a grave risk that the child would be placed in an intolerable situation, "the source of it is irrelevant: e.g., where a mother's subjective perception of events leads to a mental illness which could have intolerable consequences for the child"