“they consider that a court of another Member State with which the child has a particular connection would be better placed to hear the case or a specific part thereof, and where this is in the best interests of the child”
“The question of jurisdiction is determined at the time the court is seised. Once a competent court is seised, in principle it retains jurisdiction even if the child acquires habitual residence in another Member State during the course of the court proceeding (principle of ‘perpetuatio fori’). A change of habitual residence of the child while the proceeding is pending does therefore not itself entail a change of jurisdiction. However, if it is in the best interests of the child, Article 15 provides for the possible transfer of the case, subject to certain conditions, to a court of the Member State to which the child has moved. If a child’s habitual residence changes as a result of a wrongful removal or retention, jurisdiction may only shift under very strict conditions”