The National Security Council is a relatively modern phenomenon, and my right hon. Friend has set out some of the issues that the body discusses. The clear concern of the House, however, is that if my right hon. Friend the Member for South Staffordshire (Gavin Williamson) is not responsible for the leak, which is what he says, then someone within the NSC is. It is therefore vital that there is an independent police investigation to demonstrate whether or not he is guilty.