Shamima Begum, who is the young woman who left the UK to join Isis and who now wants to return to UK with her baby, has said:
He has no proof that I was a threat other than that I was in Isis, that’s it.
In my experience, people who say “You have no proof I did it” rather than “I did not do it” usually did it.
It may be that international law will make it hard for the UK to exclude her. But the cost to the UK taxpayer of dealing with her and her baby and probably in due course her husband (who joined Isis as a fighter from Holland) in terms of legal costs, prison, social security etc may well be very considerable. And there must be a real risk that she will continue, from any home she makes in the UK, to further the objectives of Isis.
And so the Government is quite right not to be trying to hard to go rescue her.