“(a) the deeper the child's integration in the old state, probably the less fast his achievement of the requisite degree of integration in the new state; (b) the greater the amount of adult pre-planning of the move, including pre-arrangements for the child's day-to-day life in the new state, probably the faster his achievement of that requisite degree; and (c) were all the central members of the child's life in the old state to have moved with him, probably the faster his achievement of it and, conversely, were any of them to have remained behind and thus to represent for him a continuing link with the old state, probably the less fast his achievement of it.”
‘Lord Wilson’s analogy and his other observations were directed simply to the expectation that the acquisition of a new habitual residence would be likely to coincide with the loss of the previous habitual residence. He did not intend to alter the key question which, in every case, is: where is the child habitually resident? Even though the acquisition of a new habitual residence can be expected to coincide with the loss of the previous one, hence the see-saw analogy, this issue is not determined by asking simply the question whether a child has lost their habitual residence…’
‘while Lord Wilson’s see-saw analogy can assist the court when deciding the question of habitual residence, it does not replace the core guidance given in A v A and other cases to the approach which should be taken to the determination of the habitual residence. This requires an analysis of the child’s situation in and connections with the state or states in which he or she is said to be habitually resident for the purpose of determining in which state he or she has the requisite degree of integration to mean that their residence there is habitual. Further, the analogy needs to be used with caution because if it is applied as though it is the test for habitual residence it can, as in my view is demonstrated by the present case, result in the court’s focus being disproportionately on the extent of a child’s continuing roots or connections with and/or on an historical analysis of their previous roots or connections rather than focusing, as is required, on the child’s current situation (at the relevant date). This is not to say continuing or historical connections are not relevant but they are part of, not the primary focus of, the court’s analysis when deciding the critical question which is where is the child habitually resident and not, simply, when was a previous habitual residence lost.’
‘It is clear, however, not only from Proceedings brought by A itself but also from many other authorities, that this is a shorthand summary of the approach which the court should take and that “some degree of integration” is not itself determinative of the question of habitual residence. Habitual residence is an issue of fact which requires consideration of all relevant factors. There is an open-ended, not a closed, list of potentially relevant factors.’ 36. After citing from Proceedings brought by A, Re LC (Children) (Reunite International Child Abduction Centre intervening)[2014] AC 1038 and Re R (Children) (Reunite International Child Abduction Centre and others intervening)[2015] UKSC 35 , Moylan LJ continued at paras 45 and 46: ‘I refer to the above, not to put forward any gloss on the meaning of habitual residence… but simply to demonstrate that “some degree of integration” is not a substitute for the required global analysis. I would add that, self-evidently, a test of whether a child had “some degree of integration” in any one country cannot be sufficient when a child might be said to have some degree of integration in more than one State. This is why, as referred to in my judgment in Re G-E (Children) (Hague Convention 1980: Repudiatory Retention and Habitual Residence)[2019] 2 FLR 17 (“Re G-E”), at [59], the “comparative nature of the exercise” requires the court to consider the factors which connect the child to each State where they are alleged to be habitually resident.’
‘What degree of integration will be "sufficient" will obviously vary from case to case depending, for example, on the extent to which a child has connections with, say, two states and could, potentially, be habitually resident in either of them. This is why the court has to undertake a "global analysis" which, as Ms Renton submitted, is a factual, child focused assessment, as made clear by the CJEU's decision of Proceedings Brought by HR (With the Participation of KO and Another)[2018] Fam 385 ... This will involve the court assessing the factors which connect the child with the state or states in which he or she is alleged to be habitually resident.’