The Statement makes it clear that, as Islamic State has been expelled from most of the territory it occupied in Iraq and Syria, there has been a great dispersal of those fighters. The Government said that 850 potential fighters went out to join ISIS—there can be no clearer commitment to the objectives of terrorism than having done that. Of the 850, we gather, 15% have been killed, some 400 have already returned and 300 remain, perhaps waiting to return. Has the time not come to make it absolutely clear that anyone who has left this country to fight for ISIS should not be allowed back? We cannot afford to take that risk, or to pay the huge costs of dealing with them if they do come back. Do the Government have legislative power to stop them coming back and if not, will they take such powers?