Terrorism Bill

I thank my hon. Friend for his generosity in giving way. Does he accept that with the 7/7 bombings, it took two weeks for the emergency services to gain access to all the sites, and a further six weeks for them to complete their examination? Had there been a surviving culprit—which of course there was not—28 days would have been too short. Does he agree that our experience of terrorist incidents so far points to the need for a period longer, on a renewable basis, than 28 days?