UK-Iranian Dual National Arrested as Police Probe Possible Foreign State Link in RAF Fairford Security Scare

Counter-terrorism officers have arrested a 27-year-old man who holds both British and Iranian citizenship in connection with the security incident at RAF Fairford, significantly widening an investigation that already involves five other suspects.

The man was detained in Westminster, central London, on suspicion of preparing terrorist acts, according to the senior national coordinator for counter-terrorism policing, Vicki Evans. His arrest marks the first time a suspect with dual nationality has been held in this case, adding a new dimension to a probe that had previously focused exclusively on British nationals.

In a separate development, a 26-year-old British man was questioned under caution, a procedure that allows investigators to put allegations to a suspect without making a formal arrest. Officers have also carried out searches at two properties in the area, though police have not specified what, if anything, was recovered.

The arrest came after what Evans described as a "hugely complex" investigation with "multiple lines of enquiry" being pursued simultaneously. She confirmed that detectives are examining "all possible angles — including foreign state involvement," a phrase that signals investigators have not ruled out the possibility that a foreign government may have played a role in the events.

The case began in the early hours of Sunday morning when police received reports of "three suspicious vehicles" heading towards RAF Fairford, a military airbase in Gloucestershire operated by the United States Air Force. The reports triggered a major security incident, with armed counter-terrorism officers imposing roadblocks and carrying out vehicle checks around the perimeter.

Five men in their twenties were arrested near the base later that morning on suspicion of explosives offences. The suspects — all UK nationals from London — were subsequently re-arrested on suspicion of preparing a terrorist act, a more serious allegation that carries a potential life sentence.

A detail that has puzzled observers is the disclosure, first reported by the BBC, that one of the five men had dialled 999 himself. That fact has not been fully explained by police and may prove central to understanding what the group intended at the base.

Searches of vans near the site uncovered a quantity of petrol, but no explosive devices. The discovery of fuel without an accompanying device has left investigators weighing whether the group intended to cause harm, or whether the men were involved in something less obviously criminal that nonetheless triggered alarm at a sensitive military installation.

On Monday, all five men were released on police bail, a decision that police characterised as an "investigative decision" that was "grounded in experience and strategy." The phrasing suggests detectives believed they needed more time to gather evidence before deciding whether to charge the men.

The five suspects are aged between 23 and 25. Four live in Westminster and one in Camden, and searches of their homes have been carried out. Their release on bail means they must return to police at a later date, and they remain under investigation even though they are not currently in custody.

RAF Fairford is a strategically important facility. It is a forward-operating base for the US Air Force and has been used for bomber deployments and major NATO exercises, including operations connected to the conflict in Ukraine. That makes it a potentially attractive target for hostile actors, and explains why security around the base was tightened dramatically after Sunday's alert.

Police have not identified any of the suspects, nor have they disclosed what the men said during questioning. The arrest of the UK-Iranian dual national in Westminster came to light only because counter-terror police chose to publicise it, a step they typically take when they want witnesses or members of the public to come forward with information.

The involvement of Iran — if confirmed — would elevate the case well beyond an ordinary domestic terror inquiry. British-Iranian relations have been strained for years, and Western governments have repeatedly accused Tehran of attempting to carry out hostile operations on European soil, including alleged plots against dissidents and opposition figures living in the UK.

Counter-terrorism officials have become increasingly vocal about the threat posed by state-linked actors. The mention of "foreign state involvement" by the force's most senior counter-terrorism coordinator is a notable acknowledgment that this possibility is being actively explored rather than dismissed.

Evans thanked the public for their "continued support and patience" as the investigation continues. Police have not said whether they are seeking any specific witnesses, and no charges have been brought against anyone arrested so far.

Legal experts note that the offence of preparing terrorist acts, under section five of the Terrorism Act 2006, requires prosecutors to show that a suspect intended to commit or assist in an act of terrorism. It is a broad offence that can cover planning and reconnaissance as well as the acquisition of materials, and it is frequently used in cases where an attack has been disrupted before it could take place.

The coming days are likely to see further searches, forensic examination of the seized vehicles, and analysis of communications between the suspects. Whether the investigation remains a domestic matter or becomes a case involving a foreign power will depend on what detectives uncover — and on decisions made at the highest levels of the security services.

For now, the men released on bail must await the outcome of a case that has already produced more questions than answers, while the quiet Gloucestershire countryside around RAF Fairford remains the focus of an inquiry with potentially international consequences.