Documents newly declassified by MI5, Britain's internal intelligence agency, show the late Queen Elizabeth II was not ...

Anthony Blunt, who worked at Buckingham Palace as Surveyor of the Queen’s Pictures, was secretly a Soviet spy during WWII.

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 ...

Avoid facial disguises, carry loose change and be ready to make split-second decisions: just some of the advice Britain’s ...

Security industry guns-for-hire are warned they could face jail time if they work for hostile states — even accidentally.

Some MI5 material relating to its involvement with a teenager who was charged with terrorism before taking her own life is ...

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

The manual gives instructions on preferred appearances, disguises and how to follow targets – but warns against fake ...

The files about royal art historian Anthony Blunt are among a trove from the intelligence agency MI5 released Tuesday by Britain's National Archives. They shed new light on a spy ring linked to ...

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 ...

Avoid false beards, carry plenty of spare change and know what to do when you need to tell a taxi driver "follow that cab!" - ...

A newly declassified document is on display at the National Archives. It reveals the advice given to new MI5 recruits during ...