As he said, in his former role as Secretary of State for Northern Ireland, my right hon. Friend did indeed witness the process of warrant approval. I am conscious of the need to ensure that warrants can be put in place within a reasonable timeframe. There are already agreements between the Home Office and the Security Service about the time needed for a Secretary of State to deal with a warrant and for officials to process the warrantry, and we would expect to come to similar agreements with the judicial commissioners in order to make clear the time in which a warrant needs to be considered.
The judicial commissioners, in considering the warrants under the powers they will be given, will apply the same principle as applied by a court on an application for judicial review, but in an emergency a Secretary of State will be able to authorise a warrant immediately. In normal circumstances, the double lock will be required for a warrant to be exercised, but in an emergency it will be possible to exercise it purely on the Secretary of State’s authorisation. The Bill makes it clear that the judicial commissioners should review that decision within five days and decide whether the warrant can continue or should be stopped, and if it is stopped, whether the material gained from it should be kept in certain circumstances or destroyed.