Director General of MI5 warns about threat of AI and Russia

The Director General of MI5 Sir Ken McCallum has warned of the potential for AI to be used by terrorists.

In his first on-the-record speech this year, Sir Ken also raised concerns about the number of threats MI5 has had to counter from state actors such as Russia and Iran.

BBC Security Correspondent Frank Gardner was at the speech and tells Radio 4's Sarah Montague more about the warnings.