All detention beyond 48 hours will have to be authorised on at least a weekly basis by a district judge. The judge can permit detention to continue only if he is satisfied that it is necessary and that the investigation is being carried out as expeditiously as possible. If that is not the case, the person must be released. I have said publicly to the Select Committee chaired by my right hon. Friend the Member for Southampton, Itchen that I am ready to consider in Standing Committee the case for such authorisations to be made by a senior circuit judge, as recommended by Lord Carlile. As now, the independent reviewer of our terrorism legislation will be able to monitor the use of this power and report any concerns that he or she may have. I shall give way at this point to the right hon. and learned Gentleman.