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

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

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 ...

Queen Elizabeth II was not officially informed for almost a decade that one of her most senior courtiers had confessed to ...

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

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

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 ...

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

Queen Elizabeth II wasn’t told details of her long-time art adviser's double life as a Soviet spy because palace officials ...

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

The guidance will feature in a new exhibition at the National Archives focusing on the work of the Security Service.

Top secret MI5 files detailing first-hand accounts of confessions of three of Britain's most notorious double agents ...