All news on the topic: MI5

The National Protective Security Authority (NPSA) has advised public figures to consider setting up a safe room and smoke machine intruder deterrents in their properties

Senior MI5 officers could be prosecuted for lying during a court case about a neo-Nazi agent on their payroll.

Former Tesco worker Alfie Coleman, now 22, was just 14 when he first began to trawl the internet for extreme right-wing material on is electronic devices.

The British security services were involved in formulating the controversial Legacy Act, which offered an amnesty to soldiers and paramilitaries despite MI5’s role in many killings during the Northern Ireland Troubles, it can be revealed.

Spies for hostile states, including Iran, will face longer prison sentences under new sentencing laws that take effect on Sunday.

A long-awaited nine-year investigation has concluded that MI5 allowed a top agent inside the IRA to commit murders and later hindered efforts to investigate his crimes.

Vladimir Putin has moved on from ‘revenge hits’ to pursuing his war aims on the streets of the UK, according to a seasoned intelligence expert.

MI5 officers informed the House of Commons speaker in a private meeting that they are capable of handling the risks associated with a proposed Chinese super-embassy in London, paving the way for its approval.

The ringleader of an arson attack on a Ukrainian-owned business in London last year was jailed for 17 years on Friday for what prosecutors called a “sustained campaign of terrorism and sabotage” on British soil.

The MI5 director has voiced his frustration over the trial involving two alleged Chinese spies after the high-profile case was abandoned last month.

The former head of MI5 has warned that we may be ’already at war with Russia’ as Vladimir Putin launched a brutal 12-hour bombardment of Kyiv.

A GCHQ intern has been jailed for more than seven years for taking home top secret data, endangering national security and risking the exposure of colleagues.

MI5 is facing fresh scrutiny in the case of a violent neo-Nazi agent after a High Court judge said he had "no confidence" in the Security Service’s account of how a senior officer gave false evidence.

Officer who investigated Rhianan Rudd, who died by suicide, tells inquest ‘wider conversation’ needed on such cases

MI5 misled three courts while defending its management of a misogynistic neo-Nazi state agent who assaulted his girlfriend with a machete, the BBC can reveal.

An alleged Chinese spy who penetrated the upper echelons of British society has said he ‘would never do anything to harm the interests of the UK’ after his identity was revealed.

The BBC has been given rare access inside MI5’s headquarters in London to meet a senior intelligence officer who shares what it was like to discover he was neurodivergent.

Release of intelligence year after death ‘casts doubt’ on security service’s previous claims about British spy in IRA accused of murders