Two US tankers operating from Mildenhall diverted to Germany during the morning of 9 November, while several others were subsequently transferred to Germany and other locations. The movements have not been formally confirmed as an emergency evacuation, and American authorities have not publicly identified the precise threat.
Security precautions were also reportedly raised at Mildenhall and nearby RAF Lakenheath to Force Protection Condition Charlie, the second-highest level in the US military’s five-tier defensive alert system. The measure applies when an incident or intelligence indicates that terrorist action against personnel or facilities is likely.
The reported changes involve two important American air installations in eastern England. Mildenhall supports US aerial refuelling operations, while Lakenheath accommodates combat aircraft. There has been no public confirmation that aircraft were withdrawn from Lakenheath, despite the reported increase in its security posture.
Britain’s Ministry of Defence declined to discuss the movements of American aircraft. “We do not routinely comment on the activity of other nations. Aircraft and other assets move regularly according to operational requirements,” a ministry spokesperson said.
A US Air Force spokesperson likewise declined to provide details of particular aircraft movements, explaining that American planes rotate between installations and operating locations for various reasons. The statements leave unanswered whether the redeployments were temporary precautions, part of a broader adjustment or responses to specific intelligence.
The distinction is significant because the threat has not been publicly described in sufficient detail to establish whether an attack was being prepared against Mildenhall itself. Officials were examining whether the information pointed to a particular danger or reflected a wider security warning affecting American forces.
The withdrawals follow Washington’s decision in early October to return B-1 bombers from RAF Fairford in Gloucestershire to their home stations in the United States. The Pentagon confirmed that redeployment after security concerns arose around the base, which American aircraft had used for operations against Iran.
A Pentagon spokesperson said at the time that operational security prevented confirmation of troop and aircraft movements as they occurred. The department subsequently acknowledged that all US bombers deployed at Fairford had returned to American bases, without detailing the intelligence underlying the decision.
British police arrested five men near Fairford in September during an investigation into suspected terrorist activity. Additional arrests followed, including suspects questioned over allegations of assisting Iranian intelligence. The circumstances remain subject to investigation, and the arrests do not establish that Tehran directed the alleged activity.
Prime Minister Andy Burnham said in October that there were strong indications of Iranian involvement in the suspected Fairford plot. Iran’s ambassador to Britain denied allegations of Tehran’s participation. Neither allegation nor denial resolves the investigation, and no equivalent public accusation supported by disclosed evidence has been established concerning Mildenhall.
President Donald Trump said last month that an apparent threat had influenced the decision to remove the bombers from Fairford. He argued that relocating aircraft was a comparatively inexpensive way to avoid exposing them to danger, rather than leaving them at a potentially vulnerable location.
Iran’s Islamic Revolutionary Guard Corps had previously described Fairford and other bases used to launch attacks against Iran as legitimate targets. That position has heightened attention to the security of American facilities outside the Middle East, although it does not establish responsibility for any particular threat or suspected plot in Britain.
RAF Mildenhall hosts the US Air Force’s 100th Air Refueling Wing, the service’s only permanently based aerial refuelling wing in Europe. Its tankers support aircraft movements and missions over long distances, making the location operationally important beyond its immediate surroundings in Suffolk.
The Charlie alert classification can bring tighter entry controls, more extensive checks and additional protective measures, depending on commanders’ assessments. The highest category, Delta, is reserved for circumstances involving an attack or intelligence indicating that one against a specific target is imminent.
As of Tuesday morning, no detailed public timetable has been provided for the tankers’ return to Mildenhall. Neither the British defence ministry nor the US Air Force has disclosed how many aircraft remain at the base, or whether the higher security arrangements will affect ordinary access for personnel and day-to-day operations.
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