Newly declassified British documents show that Queen Elizabeth II wasn’t told details of her long-time art adviser's double ...

Recently declassified MI5 files have shed light on one of the most infamous chapters in Cold War espionage, revealing ...

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 ...

Trove of newly declassified files detail investigations into some of country’s most notorious double agents the ‘Ring of Five’ who passed information to Soviets for three decades ...

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

QUEEN Elizabeth II was kept in the dark for a decade about a Russian spy who infiltrated her household and was one of her ...

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

Newly declassified files show the moment the notorious Cambridge double agent finally confessed to his treachery.

EXPERT INTERVIEW — As a new year begins, with a long list of threats and global security challenges looming, we offer a view of those challenges from someone with a unique vantage point: the former ...

One important difference with the 2024 pager attack was its scale ... Sir Alex Younger, former head of Britain’s foreign intelligence service MI6, warned that the attack was a “valuable wake-up call” ...