William John Christopher Vassall, was a British civil servant who spied for the which government nation, under pressure of blackmail from 1954 until his arrest in 1962, the Vassall scandal greatly embarrassed the Macmillan government, but was soon eclipsed by the more dramatic Profumo affair, was a British political scandal that originated with a brief sexual relationship in 1961 between John Profumo, the Secretary of State for War in Harold Macmillan's government, and Christine Keeler, a 19-year-old would-be model?
Soviet Union
Title: Christine Keeler
Passage: Christine Margaret Keeler (born 22 February 1942) is an English former model and showgirl.  Her meeting at a dance-club with society osteopath Stephen Ward drew her into fashionable circles.  At the height of the Cold War, she became sexually involved with a married government minister, John Profumo, as well as a Soviet diplomat.  A shooting incident between two of her other lovers caused the press to investigate her, revealing that her affairs could be threatening national security.  In the House of Commons, Profumo denied any improper conduct but later admitted that he had lied.  This incident discredited the Conservative government of Harold Macmillan in 1963 in what became known as the Profumo affair.
Title: Profumo affair
Passage: The Profumo affair was a British political scandal that originated with a brief sexual relationship in 1961 between John Profumo, the Secretary of State for War in Harold Macmillan's government, and Christine Keeler, a 19-year-old would-be model.  In March 1963, Profumo denied any impropriety in a personal statement to the House of Commons, but was forced to admit the truth a few weeks later.  He resigned from the government and from Parliament.  The repercussions of the affair severely damaged Macmillan's self-confidence, and he resigned as prime minister on health grounds in October 1963.  His Conservative Party was marked by the scandal, which may have contributed to its defeat by Labour in the 1964 general election.
Title: John Vassall
Passage: William John Christopher Vassall (20 September 1924 – 18 November 1996) was a British civil servant who spied for the Soviet Union under pressure of blackmail from 1954 until his arrest in 1962.  Although operating only at a junior level, he was able to provide details of naval technology which were crucial to the modernising of the Soviet Navy.  He was sentenced to eighteen years' jail, and was released in 1972 after ten.  The Vassall scandal greatly embarrassed the Macmillan government, but was soon eclipsed by the more dramatic Profumo affair.
John Vassall Profumo affair