That already happened a while ago (though MI5, not GCHQ), according to this guy[1] and several other "theorists" (viz. [2]) MI5 themselves beg to differ[3] (th

That already happened a while ago (though MI5, not GCHQ), according to this guy[1] and several other "theorists" (viz. [2]) MI5 themselves beg to differ[3] (though they don't address Wallace's allegations directly, it seems.) And the whole idea, with a fictional PM, was made into a novel by eminently monitorable ex-MP Chris Mullin[4] and then a miniseries. 1: https://en.wikipedia.org/wiki/Colin_Wallace 2: https://en.wikipedia.org/wiki/Harold_Wilson_conspiracy_theories 3: https://www.mi5.gov.uk/home/about-us/who-we-are/mi5-history/the-cold-war/the-wilson-plot.html 4: https://en.wikipedia.org/wiki/A_Very_British_Coup