Cambridge Five

The Cambridge Five were a group of British intelligence agents who spied for the Soviet Union during and after World War II. It was active from the later 1930s until at least into the early 1950s. 

None were ever prosecuted for spying. The number of people in the ring became public slowly since the 1950s. Their most damaging action was when they gave information about the Manhattan Project to the Soviet Union.
The sudden flight of Donald Maclean (cryptonym: Homer) and Guy Burgess (cryptonym: Hicks) to the Soviet Union in 1951 was the first public news. 

In 1961, defector Anatoliy Golitsyn provided information which pointed to Kim Philby. Philby (cryptonyms: Sonny, Stanley), fled the country in 1963. He spent the rest of his life in Moscow.Knightley, Phillip 2003. Philby: KGB Masterspy. Andre Deutsch, London. ISBN 978-0-233-00048-0. 1st American edition has title: The Master Spy: the story of Kim Philby. ISBN 0394578902.

After Philby's flight, British intelligence got confessions from Anthony Blunt (cryptonyms: Tony, Johnson) and then John Cairncross (cryptonym: Liszt), who were the last two of a group of five. Their involvement was kept secret for many years: until 1979 for Blunt, and 1990 for Cairncross.  

The group became known as the Cambridge Five. All five spies met as students or teachers at Cambridge University.Sinclair, Andrew  1987. The Red and the Blue: intelligence, treason and the universities. Coronet Books, Hodder and Stoughten, London. ISBN 0-340-41687-4The fourth man speaks: Last testimony of Anthony Blunt The Independent McSmith, Andy. 23 July 2009.

References

Category:British spies for the Soviet Union
Category:World War II
Category:Cold War
Category:1940s in England
Category:1950s in the United Kingdom
Category:University of Cambridge