Journalist Peter Taylor reveals the story of how a former undercover MI5 officer put his life and career on the line to encourage the IRA to end its violent campaign and embrace politics.

David Hare concludes his trilogy of films about MI5 renegade Johnny Worricker with another fugue on power, secrets and the British establishment. Johnny Worricker goes on the run with Margot ...

Ken McCallum has been appointed the new director general of MI5, the security service has said. Mr McCallum led counter terrorism investigations during the London 2012 Olympic Games and MI5's ...