A closer look at recently declassified MI5 files on the intelligence failure surrounding the five "Cambrdige spies" ...

The National Archives has released declassified MI5 files, including the confession of a civil servant who worked in the ...

From traitor’s confession to Queen’s involvement - Trove of newly declassified files detail investigations into some of country’s most notorious double agents the ‘Ring of Five’ who passed information ...

Top secret MI5 files detailing first-hand accounts of confessions of three of Britain's most notorious double agents ...

Queen Elizabeth II was not officially informed for nearly a decade that Anthony Blunt was a Soviet spy, newly declassified documents reveal.

Britain’s National Archives on Tuesdayreleased declassified MI5 domestic counterintelligence agency files containing the confessions of notorious double agents known as the “Cambridge Five” who spied ...

The newly-declassified documents include details about some of the UK's most notorious spies.

Amid fears of arrest and that their spy ring was about to be broken up ... The trio, together with Kim Philby and John Cairncross, had all been recruited by the Russians while or after studying ...

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