I hope that the hon. Gentleman will accept that I hold no brief for the SNP—I struggle on many days to hold any affection for it. But may I offer him the opportunity to reflect on what he has said about the duty of the SNP Members and others of us, including a substantial number on his Benches? None of us would seek to undermine the work of the security services, but it is our duty to ensure that the powers given to them by this House are necessary and proportionate. That is the work in which we are engaged here, and if we are talking about a breach of duty, it would be a breach of our duty if we were not to do that.