Five Cambridge University graduates served as double agents, leaking highly classified information to the Soviet Union ...
QUEEN Elizabeth II was kept in the dark for a decade about a Russian spy who infiltrated her household and was one of her ...
Top secret MI5 files detailing first-hand accounts of confessions of three of Britain's most notorious double agents ...
Newly declassified files show the moment the notorious Cambridge double agent finally confessed to his treachery.
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