Newly released MI5 files from the National Archives reveal that British intelligence monitored potential connections between French government interests and nationalist movements in Scotland and Wales ...

Sir Anthony Blunt, the Royal Family's picture surveyor and renowned art historian, finally admitted that he had been a Soviet ...

WWII-era guide for UK spies to go on display Avoid facial disguises, carry loose change and be ready to make split-second decisions: just some of the advice Britain's domestic spy agency gave recruits ...

Five Cambridge University graduates served as double agents, leaking highly classified information to the Soviet Union ...