Sir Ken McCallum under pressure after Security Service found to have lied in attempt to prevent BBC from unmasking one of its ...

The woman’s demand follows MI5’s admission it gave false evidence in her human rights case.

The Security Service gambled BBC correspondent Daniel De Simone had no evidence. A note, an email and a recording proved it ...

In an unprecedented humiliation, the security service apologises for “inaccurate” evidence.

Ken McCallum contacted Tim Davie directly after BBC began investigating activities of agent who had attacked girlfriend with ...

Blunt, who worked at Buckingham Palace as Surveyor of the Queen’s Pictures, was under suspicion for years before he finally confessed in 1964 that, as a senior MI5 officer during World War II ...

Avoid facial disguises, carry loose change and be ready to make split-second decisions: just some of the advice Britain’s domestic spy agency gave recruits tailing subjects nearly a century ago.

The secret files record how the country's security services ... laws and released at MI5's discretion subject to redactions, also reveal Philby confessing to MI6 officer and friend Nicholas ...

Complete with drawings detailing how best to tail the suspect, the country's MI5 security services issued the World War II-era guide to "observation" work to officers unfamiliar with this key ...

Complete with drawings detailing how best to tail the suspect, the country’s MI5 security services issued the World War II-era guide to “observation” work to officers unfamiliar with this ...

Newly released MI5 files reveal that ... Blunt confessed to the British royals in 1964 that he was a senior officer for the Russians during World War II. However, Elizabeth wasn’t clued in ...

Blunt, who worked at Buckingham Palace as Surveyor of the Queen’s Pictures, was under suspicion for years before he finally confessed in 1964 that, as a senior MI5 officer during World War II ...