I just feel that if someone is born and bred in your country, then he's yours, whether you like it or not; deal with him as you will. In this case, I would feel the same if he ('Jack') were born in Canada - I would consider him our problem, and would not want to see my government fob him off on Britain. Yes, the letter of the law allows it, but it doesn't seem right to me. I feel the same way about felons who are sent back to some country that they were brought from when they were infants, and haven't seen since - if they grew up among us, they are our problem. It's a bit like returning the Great Dane you took as a puppy, because he's not cute any more.