With respect to the hon. Gentleman, I do not think I would put it in the terms in which he put it. That is not where we are at the moment. He invites me to speculate; he would expect me to resist speculation. Clearly, we keep matters under review, but what he has suggested is a very severe penalty, either to threaten or to carry out in respect of Turkey. Let us be clear: Turkey is a long-standing and very close ally of this country. With that comes diplomatic leverage that we can exert, and we will continue to do that with our friends and allies the Turks. We have made clear that we think that any incursion into Syria would be wrong. It would be wrong in principle, and in practice I think it would be disastrous in relation to the fight against Daesh.