Counter-terrorism

My hon. Friend can probably guess that I am about to ask a question similar to my last one about judicial oversight, the charter and human rights legislation. I am sure he recognises that there is a potentiality, if not a certainty, that these matters will be challenged, particularly the exclusion orders. Does he not think that there is still time to consider imposing a restriction on those who have repudiated allegiance to the UK to prevent their returning to the country?