Key takeaways
- The United States moved more than a dozen aircraft out of RAF Mildenhall in Suffolk on November 9, 2026, after a reported threat from Iran, and neither Washington nor London has publicly detailed the threat.
- The move is the second recent US withdrawal from a British base, following the removal of B-1 bombers from RAF Fairford after a suspected Iran-linked plot in September.
- The US Justice Department unsealed an indictment on November 10, 2026, but no public evidence links the Mildenhall threat to the three defendants.
- British MPs are pressing the government on air base defences, while Iran denies involvement in the Fairford plot and says bases used against it are not beyond a defensive response.
The United States moved more than a dozen military aircraft out of RAF Mildenhall, a US Air Force base in Suffolk, England, on Monday, November 9, 2026, after what the Wall Street Journal described as a threat from Iran. NBC News reported that a US official confirmed the departures and an increased security posture at the base. It is the second British base the US has thinned out since a suspected Iran-linked plot at RAF Fairford in September, and it matters because UK bases are central to US operations in the war with Iran.
What happened at RAF Mildenhall?
Aircraft counts differ by source. Fox News, citing the Associated Press, said flight-tracking analysts identified 13 US aircraft leaving late on Monday. CNN’s analysis of flight data counted 10 refuelling aircraft relocated, while the defence outlet The War Zone put the total at at least 15 over two days.
The aircraft included KC-135 Stratotanker refuelling planes and three CV-22B Ospreys. According to the Christian Science Monitor, tankers were flown to bases in Germany, Scotland and Spain, while the Ospreys went to nearby RAF Lakenheath, which has hardened aircraft shelters. Mildenhall hosts the 100th Air Refueling Wing, which CNN described as the US’s only permanent home in Europe for refuelling aircraft.
The Wall Street Journal, as relayed by Reuters and others, reported that Mildenhall and Lakenheath were raised to Force Protection Condition Charlie, the second-highest US defensive threat level, which indicates a likely terrorist action. A US Air Force spokesperson said aircraft move regularly according to operational requirements. US European Command said it would be inappropriate to comment on matters of intelligence, according to The War Zone.
Why did the US pull aircraft after the RAF Fairford plot?
The Mildenhall move follows a September incident. According to NPR, three vans set off toward RAF Fairford in Gloucestershire on September 26, and British authorities seized all three early the next morning. The US withdrew its B-1 bombers from Fairford days later.
On November 10, 2026, the US Justice Department unsealed an eight-count indictment against three men it called Iranian-backed operatives. Al Jazeera reported that the charges describe nearly 20 attacks and attempted attacks across the US and Europe, including the Fairford plot, and that prosecutors tie the men to Iran’s Islamic Revolutionary Guard Corps and Iraq’s Kataib Hezbollah. FBI Director Kash Patel said, according to the BBC, that the indictment shows Iran’s determination to commit attacks in Europe and the US.
Iran rejects the allegations. Foreign Minister Abbas Araghchi dismissed the Fairford accusations in a September 30 post on X, Iran International reported. The same outlet noted that no publicly disclosed evidence connects the Mildenhall threat to the three men indicted.
How is Britain responding to the RAF Mildenhall departures?
Downing Street said British bases remain secure and that London and Washington share intelligence on threats, according to The Mary Sue’s summary of official statements. In the House of Commons on November 12, 2026, a minister said the movement of US aircraft is a matter for the United States, according to Hansard.
Pressure is building on base defences. The National reported on November 13 that MPs are urging more investment in hardened aircraft shelters, noting that only a handful of UK bases have them. LBC reported that a member of the Defence Committee warned airfields are “totally exposed to attack”, a day after it reported that Iranian state media had named Fairford, Mildenhall and Lakenheath on a map of potential targets.
Newsweek reported that the US Air Force also responded to suspected unauthorised drone activity over Lakenheath days after the Mildenhall departures, with no personnel, aircraft or infrastructure affected. The Air Force has not publicly identified a suspect.
What does it mean for the UN and the wider Iran war?
The episode sits within a long-running dispute over the legal basis for UK base use. According to Al Jazeera, Prime Minister Keir Starmer allowed US use of British bases for limited defensive operations in March, after initially refusing. Iran has argued the opposite. Press TV reported that Araghchi accused London of putting British lives at risk by allowing its bases to be used for aggression against Iran.
The UN dimension is direct. In February 2026, Iran’s UN mission wrote to Secretary-General António Guterres warning that bases and assets of a hostile force would be legitimate targets and named Fairford and Diego Garcia, according to The National. On November 13, 2026, the UK’s ambassador to the UN, Sarah MacIntosh, told a Security Council meeting on the Middle East that Iranian-aligned groups’ actions risk triggering a spiralling regional conflict, according to a compilation of the UK statement. Related Council activity on Iran-aligned groups is covered in Intelligence Report’s analysis of renewed Yemen sanctions.
Iranian state-linked media has also threatened other European bases, including in Germany, Italy and Greece, CNN reported. Whether Iran can reach them is less clear: the Royal United Services Institute has said a strike on the UK is theoretically possible but would face defended airspace, according to Iran International.
What to watch
- Whether the US or UK government publicly explains the Mildenhall threat, or whether the tankers return from Germany, Spain and Scotland.
- Any change in Force Protection Condition Charlie status at Mildenhall and Lakenheath.
- UK ministerial statements on funding for hardened shelters and air defence at bases hosting US forces.
- Further indictments or UK prosecutions tied to the Fairford case, and any Iranian response to the November 10 charges.
- Further Security Council meetings on the Middle East and any new Iranian letters to the Secretary-General.
Frequently asked questions
Why did US aircraft leave RAF Mildenhall?
The Wall Street Journal reported that the US military moved tankers and tiltrotor aircraft on November 9, 2026, over a threat from Iran. US officials called the moves precautionary and routine, and neither the US nor the UK has publicly detailed the threat. The base was also raised to Force Protection Condition Charlie.
Which aircraft left RAF Mildenhall and where did they go?
Reports describe KC-135 Stratotanker refuelling aircraft and three CV-22B Ospreys. Counts range from 10 to at least 15 depending on the source. Tankers went mainly to Germany and Spain, with one landing at Prestwick in Scotland, while the Ospreys moved to nearby RAF Lakenheath.
Is RAF Mildenhall connected to the RAF Fairford plot?
No public evidence links them. The US Justice Department indicted three men on November 10, 2026, over an alleged plot at RAF Fairford and other attacks, but Iran International noted nothing disclosed connects them to the Mildenhall threat. Iran denies involvement in the Fairford incident.
Sources
- US evacuates 13 military aircraft from second UK base as new Iran threat raises alarm
- U.S. moves military aircraft from British base amid Iran threats
- Why are there so many security incidents linked to US military in Britain?
- USAF Aircraft Continue To Reposition Away From RAF Mildenhall Amid Reports Of Iranian Threats
- Iran war: US moves military aircraft from a second British air base
- Iran threat forces US aircraft out of second British airbase
- An Iran-backed trio is accused of plotting attacks on a U.K. base hosting U.S. jets
- US charges 3 men over alleged Iranian-backed plot at UK Fairford airbase
- Three Iran-backed suspects plotted attacks including RAF Fairford incident, US says
- Iran threatens US bases in Europe if attacks resume
Top image: U.S. Air Force photo by Airman 1st Class Alexandria Lee / Wikimedia Commons (Public domain)
This article was produced by the Intelligence Report Desk. Sources are linked below.
