A telegram from Washington stating that MI6 counter-intelligence officer, John Cairncross, later identified as the “fifth man” in the Cambridge spy ring, had admitted spying for Russia.

Newly declassified British documents show that Queen Elizabeth II wasn’t told details of her long-time art adviser’s double ...

MI5’s top interrogator was baffled by Kim Philby, admitting he could not determine whether he was a Soviet spy, according to ...

Philby gave it to his old MI6 friend, Nicholas Elliott, on 9 and 11 January 1963. Elliott, rather than an experienced MI5 interrogator, had been sent out from London to quiz Philby because it was ...

Documents newly declassified by MI5, Britain's internal intelligence agency, show the late Queen Elizabeth II was not ...