Thames House Recalibrates: State Threats Match Terror in MI5 Priorities

Intelligence agencies rarely miss an opportunity to remind the public how dangerous the world has become, and Thames House is no exception. In his annual address in London, MI5 Director General Sir Ken McCallum outlined a security landscape where traditional counter-terrorism now shares equal billing with foreign state threats. According to the intelligence chief, state-sponsored hostile activities in the United Kingdom have quadrupled over the past decade.

This operational shift has forced British security services to divide their resources almost equally between countering terror plots and thwarting foreign state operations. McCallum identified Russia and Iran as primary sources of hybrid warfare—a broad category covering cyber-attacks, covert sabotage, and online disinformation designed to exert political pressure.

Regarding Russian intelligence activities, British officials claim that the expulsion of nearly 1,000 covert personnel across Europe following the invasion of Ukraine has disrupted Moscow’s traditional espionage apparatus. According to MI5, this has forced a reliance on hired criminal proxies to conduct disruption on British soil. McCallum also addressed ongoing commentary regarding Russian online bot farms during the 2016 Brexit referendum, noting that while foreign actors attempted to sway opinion, the referendum result itself remained beyond dispute.

Iran was similarly cited for expanding hostile operations within the country. British counter-terrorism police have made 50 arrests over the past year linked to Iranian networks, which London claims have targeted both Jewish communities and sensitive military locations, including RAF Fairford. Addressing these foreign interventions, the intelligence chief noted that those who seek to cause mayhem on British streets - whether hired thugs here or their paymasters overseas - will meet an unflinching response.

To counter these foreign networks, security services are making extensive use of powers granted under the 2023 National Security Act, targeting state-aligned operations originating from Iran, Russia, and China. Meanwhile, the security assessment highlighted the integration of artificial intelligence into extremist tactics. Officials warned that radical groups are exploring AI tools to refine drone reconnaissance, streamline propaganda, and investigate potential bioweapon development. To process these emerging risks, MI5 has established an AI Threat Assessment Centre in collaboration with GCHQ, MI6, and the national AI Security Institute.

Written by Freya Stensrud freya.stensrud@alpineweekly.com