Judges rule the case brought by Manchester Arena bomb survivors and the bereaved had come too late.

Survivors of the bombing and those bereaved in the 2017 attack are suing the security services.

In a wide-ranging speech, Ken McCallum also revealed MI5 had responded to 20 plots backed by Iran since 2022.

The BBC is given rare access to MI5 HQ in London, to meet a neurodivergent intelligence officer.

Judges are investigating MI5's handling of the agent, who attacked his girlfriend with a machete.

The case relates to a major surveillance operation into activities of alleged dissident republicans.

The case relates to a major surveillance operation into activities of alleged dissident republicans.

For years, Western spy agencies have talked of a need to focus on China, but senior officials say the threat has not been taken seriously enough.