Britain’s prime minister announced on Tuesday that Iran’s Islamic Revolutionary Guard Corps was "almost certainly" responsible for a hostile act targeting the Royal Air Force base at Fairford, and ordered the Iranian ambassador to London for urgent discussions.
"We will not tolerate threats on our soil," the prime minister said, adding that the incident represented a serious breach of international norms.
"We will not tolerate threats on our soil," the prime minister said.
The incident, which occurred in the early hours of Monday, involved an unidentified aerial object that entered the restricted airspace surrounding RAF Fairford, a key US‑UK joint‑use facility. Military radar tracked the object for several minutes before it was intercepted and neutralised by air defence systems, according to a statement from the Ministry of Defence.
No injuries were reported, and the base’s operational capability was restored within hours. The Ministry of Defence said a thorough investigation was under way, but declined to disclose technical details of the object.
Summoning the Iranian ambassador
Following the Ministry’s briefing, the prime minister instructed the Foreign Office to summon Iran’s ambassador to the United Kingdom for an immediate meeting. The ambassador, who arrived at Downing Street later on Tuesday, was handed a formal diplomatic note demanding a clear explanation and warning of possible further action.
Foreign Secretary James Whitaker told reporters that the United Kingdom expects “full transparency and accountability” from Tehran, and that any attempt to undermine British security would be met with “decisive diplomatic measures.”
Background to the tension
Relations between London and Tehran have deteriorated over the past two years, fuelled by disputes over Iran’s nuclear programme, its involvement in regional conflicts and a series of cyber‑espionage accusations. In 2025, the UK imposed sanctions on several IRGC commanders for alleged support to militant groups in the Middle East.
Earlier this year, the United Kingdom expelled two Iranian diplomats accused of coordinating illicit activities, a move that Tehran condemned as “unjustified interference.” The RAF Fairford incident marks the first overtly hostile act on British territory that officials have linked directly to the IRGC.
International reaction
The United States, which shares the Fairford airfield for strategic bomber deployments, issued a statement expressing “concern” over the breach and pledged to work closely with its British ally. NATO’s Secretary‑General, Jens Stoltenberg, called the event “a reminder of the persistent threats facing alliance members.”
Iran’s foreign ministry, through spokesperson Ahmad Ranjbar, denied any involvement, describing the UK’s accusations as “baseless and politically motivated.” The ministry also warned that Tehran would consider “appropriate reciprocal measures” if the United Kingdom proceeds with further diplomatic sanctions.
What comes next
Analysts at the Royal United Services Institute (RUSI) suggest that London may pursue a range of options, from expelling additional Iranian diplomatic staff to coordinating a joint response with the United States and EU partners. "The UK is signalling that it will not be passive," said senior fellow Dr. Aisha Patel. "The next steps will likely hinge on the findings of the defence inquiry and Tehran’s response to the diplomatic note."
Parliamentary committees are expected to hold a series of hearings on the incident, with opposition parties urging the government to consider broader sanctions against Iran’s military apparatus.
In the meantime, security forces have heightened alert levels at other strategic sites across the country, and the Ministry of Defence announced additional training for air‑defence crews to counter similar threats.
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