Question: 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?
Sentence (from "John Vassall"): 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.
Relevant evidence: Yes