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

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

The newly-declassified documents include details about some of the UK's most notorious spies.

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 "follow that cab" when pursuing a suspect, newly declassified documents ...

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

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 ...

A defendant in an alleged Russian spy ring case told police he had already spoken to MI5 when he was arrested, the Old Bailey ...

A closer look at recently declassified MI5 files on the intelligence failure surrounding the five "Cambrdige spies" ...

A World War II-era tailing guide is among declassified records shedding light on spy game in MI5: Official Secrets, at the National Archives.

That was the advice issued to rookie MI5 “watchers” whose job it was to covertly follow and report on suspected enemy agents. The guidance is contained in a booklet issued to all new recruits to the ...