Director General of MI5 since 2020
British counter-terror police have rearrested a 24-year-old British national and a 25-year-old dual UK‑Iranian national under the National Security Act in connection with a suspected plot near RAF Fairford on 27 September. Investigators have said they consider Iranian state involvement highly likely and are continuing a "hugely complex" inquiry; no charges have been filed.
MI5 has published an Espionage Alert saying the China General Technology Research Institute (CGTRI) has funded projects involving more than 100 UK-based academics and has very strong ties to China’s Ministry of State Security. Security minister Dan Jarvis has written to university leaders telling them to end relationships with CGTRI; continuing ties could expose staff to prosecution under the National Security Act.
Multiple suspects were detained near RAF Fairford in Gloucestershire on suspicion of explosives and terrorism offenses. Five British men were released on bail as the investigation unfolds; authorities say no explosives were found, but the probe is ongoing with strong indications of Iranian involvement.
MI5 chief Ken McCallum has warned that Iran is expanding its operations against the UK, including at military sites such as RAF Fairford. He says AI is accelerating the threat, with potential bioweapons risk. Russia and China are also expanding hybrid tactics, and MI5 has opened an AI Threat Assessment Center.
The question of whether Russia interfered in the 2016 referendum has resurfaced as Prime Minister and MI5 warn of ongoing influence operations. Burnham has claimed a clear answer exists, sparking backlash and a renewed focus on online disinformation in the UK political process.
The UK has sanctioned two Iranian nationals over alleged “hostile activity” linked to an incident near RAF Fairford, where five British men were arrested and later released on bail. MI5 warns of Iran’s ambition to strike harder targets as investigations continue and the US pulled bombers from the base amid security concerns.
MI5 has issued its annual threat update, highlighting a shift from radicalised right-wing violence to broader threats. Iran and Russia are cited as key hostile actors, with AI-based risks to security also flagged. The document underscores the need for greater resilience as threats diversify.