An appeal for information has been sent to all MI5 staff over false evidence the service gave to three courts in a neo-Nazi ...

The final report of Operation Kenova says the security service had "greater knowledge" of Stakeknife than it had first stated ...

Concerns are raised over whether the MI5 can be trusted to provide full evidence to courts and investigations following the ...

MI5 has offered an “unreserved” apology to the High Court saying there had been “failings and errors” in legal proceedings related to an alleged source accused of abusing two women. An injunction was ...

Freddie Scappaticci was linked to 14 murders and 15 abductions; he worked in a ruthless IRA unit known as the "nutting squad".

MI5 lied to three courts while defending its handling of a misogynistic neo-Nazi state agent who attacked his girlfriend with a machete, the BBC can reveal. Arguing for secrecy, the Security Service ...

MI5 is contending with near-record volumes of terror investigations and fast-rising state threats, the intelligence agency's boss has warned. The security service is ...

The head of MI5 has released a statement saying he is "profoundly sorry" that the agency did not prevent the 2017 Manchester Arena attack This comes after an inquiry finds that the security service ...

Chinese state operatives present a daily national security threat to the UK, the head of MI5 Sir Ken McCallum has said. In a speech, he said MI5 had intervened operationally to disrupt Chinese ...

A High Court ruling will allow the BBC to publish a story about a man it says exploited his status as an MI5 informant to abuse his partner. The BBC said the decision will allow it to tell a story ...

The BBC is to be prevented from naming a man it says exploited his status as an MI5 informant to abuse a partner and poses an ongoing threat to women. A High Court judge has ruled, external that ...