Sir Roger Hollis, MI5’s expert on
Communism, who served as director-
general for nine years but was suspected
of having been a Soviet mole.
Oleg Lyalin, the KGB defector whose
evidence led to Operation FOOT, the
expulsion of the entire KGB and GRU
rezidenturasin London.David Bingham, the officer who sold the Royal Navy’s
secrets to the Soviets but was caught by a telephone tap
on the embassy.