Newly released MI5 files from the National Archives reveal that British intelligence monitored potential connections between ...

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

The UK's terrorist threat level is currently classified as "substantial," meaning an attack is considered likely.

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

FREED gangster Liam Byrne has been mockingly branded an MI5 agent after his release from prison, we can reveal. Byrne was taunted as a “rat” on social media ­platforms following his release from ...

British counter-terrorism officers are on high alert amid concerns of a copycat attack in the wake of the New Orleans atrocity. Police and MI5 fear Islamic State supporters could be triggered into ...

He is considered one of the most successful double agents of the Cold War period in British intelligence history. The MI5: Official Secrets exhibition opens at The National Archives this spring.

AT least 11 UK terror plot cases since 2020 have involved 3D-printed guns, MI5 has revealed. The threat of the untraceable weapons was highlighted by the agency’s ...

In the files relating to Anthony Blunt, there is a transcript of the interview conducted by MI5. Top secret MI5 files detailing first-hand accounts of confessions of three of Britain's most ...

MI5 has circulated a warning to MPs and peers regarding a female ... Ms Lee is reportedly involved in the China Overseas Friendship Association and the British-Chinese Project. She is also listed as a ...

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or ...

Around the same time, a KGB defector told spooks that a young British actor had been targeted in a possible recruitment attempt in the Russian capital. MI5 thought this man might have been Bogarde ...