My Lords, this is the first time the Government have so publicly revealed the sheer scale of the terrorist threat. The perpetrator seems to have been one of 40,000 on a Security Service B-list; another 3,000 are on an A-list. This is a massive threat to our society, mainly but not solely from Islamic extremists. Surely it is now time for a further step change in the resources devoted to this matter. It takes years to recruit, train and engage new members. Does the Minister agree that now is the time to take in hand this work?