“Where BIIR applies, the courts of England and Wales do not have jurisdiction merely because the child is present within England and Wales. The basic principle, set out in Art. *(1), is that jurisdiction under BIIR is dependent upon habitual residence. It is well established by both European and domestic caselaw that BIIR applies to care proceedings. It follows that the courts of England and Wales do not have jurisdiction to make a care order merely because the child is present within England and Wales. The starting point in every such case where there is a foreign dimension is, therefore, an inquiry as to where the child is habitually resident.”