"If a decision is made to return the child it must be because it is in his best interests to do so, not because the welfare principle has been superseded by some other consideration."
"There is no presumption that it is likely to accord with the child's welfare needs to be returned. The most one can say… is that the judge may find it convenient to start from the proposition that it is likely to be better for the child to return to his home country for disputes about his future to be decided there. …"
"One important variable is the degree of connection of the child with each country. Factors such as his nationality, where he has lived for most of his life, his race, ethnicity, religion … will all come into this. Another closely related factor will be the length of time he has spent in each country."