Counter-Terror Police Arrest UK-Iranian Dual National as RAF Fairford Probe Expands

Counter-terrorism officers have arrested a 27-year-old man holding both British and Iranian nationality on suspicion of preparing terrorist acts, in a significant development in the investigation into the security incident at RAF Fairford in Gloucestershire.

The man was detained in Westminster, central London, according to a statement released by the counter-terrorism policing network. The arrest marks the first time officers have publicly linked a suspect to foreign nationality in connection with the case, which began with a dramatic security alert at the US Air Force-operated base on Sunday.

A second individual, a 26-year-old British national, has also been questioned under caution by investigators. Questioning under caution means the person is being treated as a suspect and has been informed that anything they say may be used as evidence, although no arrest has been announced in relation to this individual.

Officers have additionally carried out searches at two properties in the London area as part of the widening inquiry. The force has not disclosed what, if anything, was recovered during those searches, nor has it indicated whether further arrests are anticipated.

The investigation's complexity was underscored by Vicki Evans, the senior national coordinator for counter-terrorism policing, who said officers are pursuing "all possible angles - including foreign state involvement." Her comments represent a rare public acknowledgment that state-sponsored activity has not been ruled out, a dimension that would elevate the case from domestic criminality to a matter of national security concern.

"The investigation into circumstances surrounding events in Gloucestershire is hugely complex, and our specialist teams are interrogating multiple lines of enquiry," Evans said. She also thanked the public for their "continued support and patience whilst we work through this investigation."

The case originates from events in the early hours of Sunday morning, when police received reports of "three suspicious vehicles" travelling in the direction of the airbase. The reports triggered a major security incident, with a heavy police presence visible around RAF Fairford in the hours that followed.

Five men in their twenties were arrested near the base in the immediate aftermath. All five are UK nationals from London, and police have confirmed they remain on bail while enquiries continue. Bail in terrorism-related investigations typically involves strict conditions, including residence requirements, reporting to police and restrictions on travel or association.

The BBC has learned that one of the five men had himself dialled 999, a detail that adds an unusual and as-yet unexplained element to the sequence of events. It is not clear what prompted that call or how it relates to the reports of suspicious vehicles.

The initial arrests were made on suspicion of explosives offences, and the men were subsequently arrested on suspicion of preparing a terrorist act. They were released on bail on Monday in what police described as an "investigative decision" grounded in experience and strategy. Such decisions are common in complex terrorism probes, where releasing suspects under conditions can allow officers more time to gather and analyse evidence before any charging decision.

Police have said that a quantity of petrol was recovered during searches of vans near the site, but that no explosive devices were found. The presence of fuel, while potentially significant, does not by itself constitute evidence of a viable explosive device, and investigators have not suggested that any device was assembled or deployed.

The five men originally arrested are aged between 23 and 25. Four live in Westminster and one in Camden, both densely populated London boroughs. Searches of their home addresses were carried out as part of the investigation.

RAF Fairford is a longstanding installation in Gloucestershire that operates under the United States Air Force. It has historically hosted American bomber aircraft and other strategic assets, making it a site of considerable security sensitivity. The base's profile means any security breach or attempted breach is treated with particular seriousness by both UK and US authorities.

The involvement of counter-terrorism police rather than local officers reflects the assessment that the incident may be linked to ideologically or politically motivated activity rather than ordinary criminal conduct. The explicit reference to possible foreign state involvement adds a further layer, suggesting investigators are examining whether any external actor may have directed, funded or otherwise supported those involved.

Foreign state involvement in UK-based incidents is a growing area of concern for security services. Western governments have in recent years warned about hostile state activity on their soil, including surveillance, sabotage and plots against dissidents. If a state link were established in this case, it would carry significant diplomatic and legal ramifications.

Legal experts note that the offence of preparation of terrorist acts, under UK terrorism legislation, allows prosecutors to act before any attack is carried out. It requires evidence that a person intended to commit acts of terrorism and took steps towards doing so, and it carries a maximum sentence of life imprisonment. The threshold is deliberately set to enable early intervention.

The Metropolitan Police and counter-terrorism policing have not released the name of the 27-year-old arrested in Westminster, in line with standard practice before any charge is brought. Under UK law, suspects in terrorism investigations can be held for up to 14 days without charge, though arrests are frequently resolved sooner depending on the evidence.

The case also raises questions about security at military installations in the UK, particularly those hosting allied forces. Reviews of perimeter security and threat assessments often follow incidents of this kind, although officials have not announced any specific changes in response to the Fairford events.

Public reaction in Gloucestershire has been one of shock mixed with reassurance at the visible police response. Local residents reported road blocks and armed patrols around the base on Sunday, images that circulated widely and underscored the seriousness with which authorities treated the initial reports.

The investigation remains active, and police have stressed that the enquiries are continuing across multiple strands. No charges have been brought against any of the individuals involved so far, and all those arrested or questioned retain the presumption of innocence.

Officers have appealed for anyone with information to come forward, while emphasising that they are working methodically through a substantial volume of material. Further updates are expected as the investigation progresses, and the possibility of additional arrests or charges has not been excluded.

For now, the case sits at the intersection of domestic counter-terrorism and international security, with investigators balancing the need for public transparency against the operational demands of a fast-moving and highly sensitive inquiry. The coming days are likely to prove decisive in determining whether the Fairford incident is treated as an isolated criminal matter or something considerably more serious.