Historian and exhibition curator Mark Dunton speaks about special files that will form part of a special exhibition at the National Archives titled 'MI5: Official Secrets', featuring case files ...

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 ...

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

Some of the documents released today will feature in a forthcoming exhibition at the National Archives. The Director General of MI5, Sir Ken McCallum, said: "While much of our work must remain secret, ...

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 World War II-era guide to tailing a target, and files on notorious double agents such as Kim Philby, feature in MI5: ...

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

Queen Elizabeth II was not officially informed for nearly a decade that Anthony Blunt was a Soviet spy, newly declassified documents reveal.

That was the advice issued to rookie MI5 “watchers” whose job it was ... focusing on the work of M15 due to open at the National Archives in Kew, west London, in the spring.

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 ...