My hon. Friend is right to suggest that these are approximate figures. It is impossible to get the actual number of people who have gone to Syria and remain there, but he is right to suggest that there are possibly about 300 with British connections. We have received some information through the security services and through some of our allies, but it would be inappropriate to share that publicly. I can say, however, that many of those individuals remain active and very dangerous, and we are continuing to work with our allies to see what we can do to maintain our national security.