My Lords, I want to reinforce what the Minister has said about the prejudice which a sunset clause would have to the confidence which partners would have in us. I noticed that the noble Lord, Lord Marks, was modifying his proposals in his speech because he has recognised that.
Let us suppose that an ally is at this moment considering whether to pass confidences to the Government. If those confidences were held by the intelligence services they would be protected under the Bill. If they were held by another department, they could be protected only by a certificate passed by a Secretary of State. If at this moment the ally was considering whether to pass those confidences to this country and was uncertain whether in four or five years’ time there would be closed procedures under which that certificate could then be considered, it would be a matter of uncertainty whether those confidences would be protected in four or five years’ time. That would affect the willingness of allies to pass secrets to us now. It would, therefore, be very damaging if a sunset clause in the form proposed originally by the noble Lord, Lord Marks, supported by the Opposition, were to pass into law. I very much hope that the House will not support that proposal.