MI5: Official Secrets, a landmark exhibition at The National Archives, unveils 115 years of real espionage. Discover coded ...

Britain's domestic spy agency MI5 issued a rare public warning to members of parliament on Monday that they are being ...

Sir Ken McCallum says MI5 has acted against Chinese activity in the last week as parliamentary inquiry launched into spy case ...

Britain is facing an escalating threat from hostile states such as Russia, Iran, and China while the terrorism risk is "huge" ...

Ken McCallum confirmed MI5 thwarted a China threat last week, but expressed frustration over a collapsed prosecution of two ...

One in five terror suspects arrested last year were children, the head of MI5 has revealed. Sir Ken McCallum said terrorism ...

The espionage case against Christopher Berry and Christopher Cash collapsed after government officials refused to testify ...

Sir Ken admits he's "frustrated when opportunities to prosecute national security threatening activity are not followed" - as ...

He also told prosecutors it was his assessment that Christopher Cash and Christopher Berry, the two men accused of spying for ...

The MI5 chief accused Moscow, Tehran and Beijing of continuing to undermine the UK’s national security through espionage, ...

MI5 has urged politicians to “remain alert and trust their instincts” amid rising concern that foreign spies are targeting ...

A teacher and former parliamentary researcher were accused of passing secrets to China between 2021 and 2023, but charges ...