Counter-terror police arrest UK-Iranian dual national over RAF Fairford security incident

Counter-terrorism officers have arrested a 27-year-old UK-Iranian dual national in connection with the major security incident at RAF Fairford, the Gloucestershire airbase that serves as a forward operating location for the United States Air Force. The man was detained in Westminster, London, on suspicion of preparing terrorist acts, according to police statements released on Thursday.

A second individual, a 26-year-old UK national, has also been questioned under caution as part of the same investigation. Officers have carried out searches at two properties in the area, though police have not disclosed what, if anything, was recovered during those searches.

The arrest marks a significant development in an inquiry that has already seen five other men taken into custody and released on bail. Those five — all UK nationals from London in their twenties — were arrested in the early hours of Sunday morning near the airbase after reports of "three suspicious vehicles" travelling towards the facility. They were initially held on suspicion of explosives offences before being rearrested on suspicion of preparing a terrorist act.

Vicki Evans, the senior national coordinator for counter-terrorism policing, described the investigation as "hugely complex" and confirmed that specialist teams are pursuing multiple lines of enquiry simultaneously. "We are considering all possible angles — including foreign state involvement," she said. Evans also thanked the public for their "continued support and patience whilst we work through this investigation."

The case has fuelled speculation about potential Iranian involvement, with Prime Minister Andy Burnham stating on Wednesday that there were "strong indications" Iran played a part in the incident. Burnham did not elaborate on the nature of the intelligence behind his claim, and Tehran has strongly and repeatedly denied any involvement in the events at Fairford.

US Secretary of State Marco Rubio added to the diplomatic tension on Monday, saying that "the hands of a foreign actor" had clearly been involved. Rubio's comments came as the airbase continues to serve a strategic role in American military operations, with US bombers having taken off from Fairford for missions in the Middle East in recent months. The UK government had approved a US request to use the base for defensive strikes on Iran, a decision that has heightened scrutiny of security at the facility.

The sequence of events on Sunday morning remains a focus of the investigation. The five men were arrested after police received reports of suspicious vehicles approaching the base, prompting a major security response. According to the BBC, one of the men had dialled 999 himself approximately an hour before a local farmer alerted police to a "large group" of masked men near the vehicles. The involvement of a farmer in raising the alarm underscores the rural setting of the base and the importance of community vigilance in security operations.

During searches of vans near the site, police discovered a quantity of petrol but no explosive devices. The five men, aged between 23 and 25, were released on bail on Monday — a move police characterised as an "investigative decision" that was "grounded in experience and strategy." Four of the men live in Westminster and one in Camden, and officers carried out searches of their homes.

The release of the five men on bail does not indicate the investigation has stalled. In complex counter-terrorism cases, bail is frequently used to allow investigators more time to gather evidence while imposing restrictions on suspects' movements and associations. The decision to release rather than charge can reflect the need for further forensic analysis, digital examination, or witness testimony before prosecutors are satisfied there is sufficient evidence to bring charges.

Legal experts note that the arrest of a UK-Iranian dual national introduces additional diplomatic and legal dimensions to the case. Dual nationals can present unique challenges for prosecutions, particularly when a foreign state is suspected of involvement, as questions may arise over consular access, extradition, and the potential for diplomatic retaliation. The Iranian government's firm denial of involvement suggests that any evidence linking Tehran to the incident would carry significant international ramifications.

The security incident at RAF Fairford has also raised questions about the vulnerability of military installations in the UK, particularly those hosting US forces. The base has long been a target of protest and activism, but the involvement of multiple vehicles and a group of masked men represents a serious escalation in the nature of the threat. Counter-terrorism officials have not commented on whether security at the base has been changed in response to the incident.

The investigation remains active, with counter-terrorism officers continuing to interrogate multiple lines of enquiry. The arrest of the UK-Iranian dual national and the questioning of the 26-year-old UK national suggest that police are casting a wide net, examining both domestic and international connections. Whether charges will follow remains uncertain, and police have urged the public to avoid speculation that could undermine the investigation.

The Prime Minister's comments about Iranian involvement, coupled with Rubio's assertion that a foreign actor was involved, have placed the incident firmly within the broader context of UK-US relations with Iran. The UK's decision to permit the US to use Fairford for defensive strikes on Iran has already strained diplomatic channels, and any confirmed link between Tehran and the Fairford incident could further escalate tensions.

For now, the five men arrested near the base remain on police bail, their movements restricted as investigators continue their work. The two properties searched in connection with the latest arrest have not been publicly identified, and police have not released further details about the UK-Iranian dual national or the UK national questioned under caution. The investigation continues, and authorities have made clear that they are pursuing every possible avenue to establish exactly what happened at RAF Fairford on Sunday morning.