Counter-Terrorism and Border Security Bill

May I take the Minister back to the point about spies from other countries and people from other security forces, whether from Russia or elsewhere? In my time in Government when I was occasionally asked, as a member of the National Security Council, to sign off warrants so that the security services could search bags, tap phones and so on—even at very short notice—it was clear to me that we had powers, if we had suspicions, to do everything required to track, trace and examine the people coming into this country with hostile intent from foreign powers, and we did that on a regular basis. Will he just explain to me why the new powers are needed, given that we already had a panoply of powers?