MI5 documents reveal her private secretary ‘saw no advantage in telling her’ about treachery of Buckingham Palace art expert ...

Confessions of double agents and tips for new spies have been released as part of a tranche of recently-declassified ...

Documents from the British secret service MI5 reveal that Anthony Blunt, an art historian and supervisor of the official ...

Rookie wartime MI5 "watchers" were advised they needed to be prepared to offer a big tip if they had to tell a taxi driver to ...

BRITISH security services were monitoring the Scottish nationalist movement – and feared the French government could be supporting it, ...

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

Queen Elizabeth was left in the dark for almost a decade over the full scale of the treachery of one of her most senior ...