Cambridge Five

Harry Peter Smollett and the 15-Year Pipeline to Moscow

A man who ran Britain's wartime Soviet relations spent decades feeding Moscow from the heart of the Ministry of Information, a betrayal confirmed by papers left in a defector's luggage.

By Harlan Pryce ·

Anthony Blunt and the 1964 Immunity Pact

A man who bled MI5 secrets to Moscow held the keys to the Royal Collection, his betrayal kept secret for decades until a 1964 trade for immunity.

By Constance Bell ·