John Profumo derided lover Christine Keeler as ‘simple’ as he admitted a ‘sordid’ affair with her, newly released files show.

The former cabinet minister confided that he had sexual relations with the 19-year-old ‘three or four times’ in a mutual acquaintance’s apartment behind his wife Valerie Hobson’s back.

Having been assured by Lord Denning, who was producing a government report about the scandal, that he was speaking in the ‘strictest confidence’, he described the aspiring model as ‘ill-educated’.

The senior judge had been conducting an inquiry into a sex, politics and espionage saga that has captured the public imagination for more than six decades and been dramatised by the BBC.

National security was a key theme as Keeler had also been in a relationship with a Soviet naval

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