Iran Escalates Military Base Targeting, UK Spy Chief Warns Amid RAF Fairford Security Concerns

The head of the United Kingdom’s domestic spy agency, MI5 Director-General Ken McCallum, has stated that Iran is intensifying its efforts to target sensitive military sites in Britain. This warning follows a series of incidents at airbases, despite Tehran's denial of any involvement.

McCallum indicated in his annual speech that Tehran's strategic calculations have significantly shifted this year, with a notable increase in Iranian ambitions to target harder objectives, such as military installations. His alert came shortly after UK Prime Minister Andy Burnham suggested that Iran’s Islamic Revolutionary Guard Corps (IRGC) was “almost certainly” responsible for a suspected plot against RAF Fairford, an airbase utilized by US bombers for operations against Iran. This incident led to the United States withdrawing its military jets from the facility due to security concerns earlier this month.

US B-1 Lancer and B-52 bombers were withdrawn from RAF Fairford on October 4, 2026, following a security breach at the Gloucestershire airbase. British police had declared a major incident on September 27 after three “suspicious” vans were driven near RAF Fairford. Five British men in their 20s were apprehended on suspicion of offenses under the Explosives Act but were later released on bail. Police reported finding petrol supplies in the vans linked to the suspects but no explosives. These men were subsequently released without charge on stringent police bail conditions. Two additional individuals, including a British-Iranian national, were arrested later but also released. No charges have been filed against any of the arrested individuals.

Furthermore, two Latvian men were arrested for trespassing at RAF Molesworth, a facility used by the US military and NATO for intelligence operations, on a Friday. They were also released on bail.

In response, UK Foreign Secretary Ed Miliband announced sanctions against two Iranians for their “role in facilitating or engaging in hostile activity on behalf of the Iranian regime.” The sanctioned individuals are Ruhollah Bazghandi, head of IRGC counterespionage operations, and Shahram Ali Reza Tamarzadeh Jakki, described by British officials as a facilitator for Iran’s Zindashti criminal network.

While unable to comment on the specific RAF Fairford incident due to an ongoing investigation, McCallum noted that such events are “not unique” and have occurred elsewhere globally. He revealed that UK authorities had made 50 arrests over the past year to thwart Iran-linked operations. However, McCallum expressed doubt about Iran's capacity to execute complex attacks, such as those involving explosive drones, given the limited sophistication of operatives used in the UK. “Given what we’ve actually seen in practice in the UK in recent years, that has not been anywhere near [that] level of capability,” he stated. He did, however, acknowledge that the IRGC possesses significant experience in employing more conventional and hybrid technologies in aggressive and sophisticated ways in countries closer to Iran's homeland.

Tehran has officially denied any involvement in the Fairford incident and rejected all accusations of harmful activities within Britain.