According to the report by the MI5 agent watching him, John Cairncross appeared 'tail conscious' as he boarded a bus in London 's Trafalgar Square to his home in Lansdowne Crescent.

Cairncross, a civil servant turned intelligence officer who passed more than 5000 documents to the Soviet forces during World War II, was outed as The Fifth Man in the notorious Cambridge spy ring.

CHRISTOPHER HART: John Cairncross was born in 1916 and raised in Lesmahagow, Scotland. He is pictured with partner Gayle Brinkerhoff in 1990, the year he was confirmed as the Fifth Man.

Blunt confessed in 1964 to spying for the Soviet Union as part of the notorious Cambridge Five spy ring during World War II, ... who authored a biography of Cambridge Five spy John Cairncross, ...

The Student and the Spy: ... John Cairncross and possibly others, ... (and that of the Cambridge Five) lived on in pop culture through stories like John LeCarré’s Tinker, Tailor, Soldier, ...

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.

There may have been a fifth spy in the ring, possibly John Cairncross. Documents from the Mitrokhin Archive have been made publicly available for the first time. The FBI described them as the most ...

The files confirm that Philby recruited Donald Maclean in 1934, and how Guy Burgess, Anthony Blunt and the fifth spy, John ...

Members of the Cambridge Five spy ring were regarded by their Soviet handlers as hopeless drunks who were incapable of keeping secrets, newly-released files suggest.