Starmer Blocks US Access to UK Bases for Potential Iran Strikes

British Prime Minister Keir Starmer has reportedly denied a request from US President Donald Trump to utilize UK air bases – RAF Fairford in Gloucestershire and the joint UK-US military base of Diego Garcia in the Chagos Islands – for any preemptive military action against Iran. The decision stems from concerns about potential breaches of international law, according to multiple reports citing government sources.

Concerns Over International Law

The UK government is reportedly concerned that allowing the US to use the bases for strikes on Iran could violate international law. Specifically, the concern revolves around the principle that states supporting an attack, with knowledge of the circumstances, could be held accountable under international law. The Guardian and BBC News both reported on these concerns.

Strategic Importance of the Bases

RAF Fairford and Diego Garcia are strategically important military installations. Diego Garcia, in particular, serves as a key airfield for the US heavy bomber fleet. The Hill notes the bases’ long-standing role as staging posts for US military operations.

US-Iran Tensions and Potential Strikes

The US has been increasing pressure on Iran to curb its nuclear program and has threatened potential military action if Iran fails to comply. The US has already moved military assets to the region in preparation for a possible strike. BBC News reported that negotiations between American and Iranian negotiators in Switzerland have shown some progress, but a resolution remains uncertain. President Trump stated on February 2, 2026, that a decision on whether to pursue a deal or military action would be made within the next 10 days.

Chagos Islands Dispute

The Times of London reported that President Trump’s criticism of Keir Starmer’s deal to transfer the Chagos Islands to Mauritius and lease back a joint UK-US military base was prompted by the UK’s decision to withhold access to the bases for potential strikes on Iran.

UK Government Response

The UK Ministry of Defence declined to comment on the matter, citing operational security. But, a government spokesperson stated that the UK supports the political process between the US and Iran and that preventing Iran from developing a nuclear weapon remains a top priority. CNN reported on this statement.