" Finally, they began to investigate the prime minister, Harold Wilson. Wilson, Wright was convinced, was a KGB agent.” I’m nodding along like a metronome at this point. “There was a group, a cabal if you like, of MI5 officers. About thirty of them. They actually planned a coup d’état in 1972. They "

― Charles Stross , The Apocalypse Codex (Laundry Files, #4)