MI5 Warns AI is Amplifying National Security Threats in the UK

MI5 warns AI is accelerating security risks, including bioweapons, as new legislation strengthens national defenses.

October 13, 2026 One Min Read

POLICY WIRE — London, United Kingdom — MI5 has issued a stark warning that artificial intelligence is intensifying national security risks in the UK, with the potential for hostile actors to develop advanced bioweapons.

The head of MI5, Sir Ken McCallum, emphasized that AI is already reshaping the landscape of cyber warfare, giving attackers an edge over defenders. He highlighted that the agency is now devoting more resources to counter these evolving threats than during the Cold War era.

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Recent legislative action, including the National Security (State Threats) Bill, has granted the Home Secretary expanded powers to combat foreign-backed hostile activities. McCallum also mentioned that MI5 recently investigated a radicalized 13-year-old linked to far-right extremism, underscoring the growing complexity of domestic and international security challenges.

Reporting by Policy-Wire (PW)

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