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

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 used ...

Though many apply, only a few have the skills and patience to make it as a “watcher”, an MI5 training manual published for the first time by the National Archives reveals. Despite the rise in ...

The guidance is contained in a booklet for recruits during World War Two, which will go on display at the National Archives in Kew, west London Rookie wartime MI5 "watchers" were advised they ...

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 ...

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

But the document has been declassified and is on show in a new exhibition focusing on the work of MI5 due to open at the National Archives, in west London, in the spring. However, far from the ...

The Queen’s Private Secretary, Sir Martin Charteris, shared her composed reaction in a handwritten letter summarised by the head of the Security Service in a Top Secret memo. That memo is just ...

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 ...

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 ...