UK refuses US request to use Diego Garcia and RAF bases for potential Iran strike

The United Kingdom has denied a request from Donald Trump to use key British military bases — including Diego Garcia in the Indian Ocean and RAF Fairford in England — for any potential military strike against Iran, officials and reports said on Feb 20.

The decision comes amid rising tensions between the United States and Iran, and ongoing negotiations aimed at addressing Tehran’s nuclear programme.

According to people familiar with the matter, the UK government has not authorised the use of its bases for operational purposes that could involve military action against Iran.

Under longstanding agreements, bases such as RAF Fairford and Diego Garcia, a strategically important joint US-UK facility, require explicit approval from London before they can be used for offensive operations by foreign militaries.

UK officials, including Defence Minister Al Carns, have emphasised that any foreign use of British territory for military purposes must have a clear legal basis and policy rationale before permission is granted.

Concerns about international law and potential liability have been cited as key reasons for withholding approval to date.

The refusal is occurring in the context of a broader UK diplomatic effort to navigate its role amid escalating tensions in the Middle East.

London has stressed its support for diplomatic engagement between the United States and Iran over Tehran’s nuclear activities, while signalling reluctance to participate directly in potential military escalation.

The government has issued the standard line that it does not comment on operational defence matters.

The United States has repositioned military assets in the Middle East, including fighter jets and aerial refuelling tankers, in what the Pentagon has described as preparations for various contingencies.

Discussions over a possible strike on Iran — which Trump has not publicly ruled out — have fuelled speculation among defence analysts about forward basing options and strategic planning.

The situation has also drawn attention to a controversial sovereignty transfer deal between the UK and Mauritius involving the Chagos Islands, which include Diego Garcia.

Trump has publicly criticized the agreement, warning that Britain should not “give away” control of Diego Garcia, which he described as vital for Western defence capabilities, particularly if future operations against Iran became necessary.