The head of Britain’s domestic intelligence agency says China poses a daily threat to the United Kingdom’s security.

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

In an annual speech, Sir Ken McCallum says the security service is operating in "a new era" with terrorism remaining an "ever ...

Britain's MI5 spy chief said on Thursday he was frustrated by the collapse of a China spying case which has led to intense ...

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

The head of Britain's MI5 security service said on Thursday he was frustrated by the collapse of a China spying case which ...

Ken McCallum's remarks step up pressure on authorities to explain why the prosecution of two men charged with spying for ...

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

The head of MI5 has said he was frustrated by the collapse of the Chinese spy case. Sir Ken McCallum said the security ...

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