A ruling by London's High Court cited the domestic intelligence agency's failure to explain why representatives had ...

The evidence provided to the court was later admitted by MI5 and the attorney-general to have been false. Sir Ken McCallum, the security service’s director-general, issued an apology in February.

The Home Secretary has said she is “deeply concerned” that MI5 gave false evidence to the High Court and that the Government accepts a further investigation should take place.

IPCO told the BBC it was "misled" by the Security Service. MI5 director general Sir Ken McCallum apologised to IPCO, after the BBC challenged the Security Service's false statements to the courts.

MI5 director general Sir Ken McCallum repeated his "full and unreserved apology for the errors made in these proceedings". He said resolving this matter was "of the highest priority for MI5" and ...

MI5 previously said there had been ‘failings and errors’ in legal proceedings related to an alleged source accused of abusing two women.

Premature’ to decide whether MI5 should face contempt probe in BBC injunction case, judges rule - An injunction was granted ...

A British teenage girl, who had said she wanted to blow up a synagogue and became fixated with Adolf Hitler, had been sucked into far-right extremism by two American neo-Nazis, a British coroner ...