Last year, no one stopped for "terrorism" under the Sus Laws was even so much as arrested. Those Laws' real targets, like that of all these things, are altogether elsewhere.
But of course MI6 does not use torture. Perhaps even the commoners down the corridor do not, if only because they are too busy working on their silly television programme. And those days are certainly gone under the aegis of the FCO. David Miliband is a thing of the past.
Taking with him his Mossad methods and personnel, the former as taught by the latter (who had learned them from the Nazis) to every nasty regime in Seventies and Eighties Latin America. New Jersey and Pennsylvania, you have been warned. Occupied Territory, indeed. Just ask them in MI6. They remember Irgun, and Lehi, and all that. One of the reasons why they would never stoop to that level.