SPY chiefs probed a suspected “Russian double agent” at the heart of MI6 in a 20-year global operation, it has been revealed.

They were never seen again. Volkov could have exposed Philby and the entire Cambridge spy ring. Instead, because of Philby's interference, British intelligence stayed in the dark for years.

A 110-year-old lemon used by a German WW1 spy to send secret messages from Britain with invisible ink is going on display in MI5’s first ever public exhibition. The blackened and flattened fruit ...

He was a member of the Cambridge Five spy ring and fled to Moscow with fellow spy Donald Maclean in 1951 due to fears of being discovered. None of the Cambridge Five were ever prosecuted for spying.

A briefcase left behind by infamous Cambridge spy Guy Burgess as he fled to Moscow in 1951 is among never-before-seen MI5 artefacts going on display at The National Archives in Kew, South-West London.

PA Media Members of the secret spy cell were arrested in 2023, in one of the most significant exposures of espionage on British soil since the infamous Cambridge Spy Ring was busted in the 1960s.

Now declassified MI5 files reveal the reason the fifth man in the infamous Cambridge spy ring remained free for all of his 82 years despite passing thousands of secrets to the Russians over 15 years.

The Cambridge Five consisted of Harold ‘Kim’ Philby, Guy Burgess, Donald Maclean, Anthony Blunt and John Cairncross, who together made up the most infamous spy ring of the 20th century.

Back in 1964, he admitted to spying for the Soviet Union as part of the notorious Cambridge Five spy ring during World War II.

They shed new light on a spy ring linked to Cambridge University in the 1930s, whose members spilled secrets to the Soviet Union from the heart of the U.K. intelligence establishment.

Cairncross, the last of the spy ring to be publicly identified in the 1990s, admitted in a 1964 interview in the U.S. that he too had been recruited by Russian intelligence.