Prevention and Suppression of Terrorism

I know of the hon. Gentleman's past commitment to national security and I fully understand that in some sense he has inherited this policy. However, as I have clarified my position, perhaps he will clarify the Opposition's position. What should happen to a person who is reasonably suspected of being likely to commit an act of terrorism, perhaps resulting in thousands of deaths, but for whom we cannot—even with intercept evidence—reach the threshold necessary to charge and convict in court? What is the Conservative policy on such a person? Is it just to let him go free?