In the hot and steamy July of 1961, a hedonistic weekend at Lord Astor's Buckinghamshire estate Cliveden set in motion a chain of events like no other. It was where John Profumo, Secretary of State for War, first decided he must bed the 19-year-old Christine Keeler, a model and showgirl. But that weekend Keeler headed home to London with diplomat, and known Russian spy, Yevgeny Ivanov instead.
Undeterred, Profumo quickly started dating Keeler,...