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In a significant diplomatic move, the British government has declined to grant the United States permission to utilise UK military bases for potential strikes against Iran. This decision comes amidst escalating tensions surrounding Iran’s nuclear programme and a growing military presence in the region. The refusal to allow RAF Fairford in Gloucestershire and Diego Garcia in the Indian Ocean to be used for US operations reflects a complex interplay of international relations and domestic political pressures.
Diplomatic Strains Intensify
The BBC reports that the UK’s stance has been influenced by ongoing negotiations between American and Iranian officials in Switzerland, where some progress is apparently being made. US President Donald Trump, however, has issued stark warnings, indicating that the world will know within days whether a diplomatic resolution will be reached or if military action will ensue. Trump has publicly linked his criticism of Labour leader Sir Keir Starmer’s recent Chagos Islands deal to the UK’s refusal to allow US military operations from its bases.
With the US intensifying its demands on Iran to limit its nuclear activities, the situation remains precarious. Recent moves of warships and aircraft to the Persian Gulf signal that the US is preparing for all eventualities, including potential airstrikes if diplomatic efforts fail.
The Chagos Islands Controversy
The Chagos Islands, a UK overseas territory, have long been a point of contention, particularly due to the controversial lease of Diego Garcia to the US for military purposes. In a recent phone conversation, Trump and Starmer discussed the implications of the Chagos deal, which seeks to transfer sovereignty of the islands back to Mauritius while maintaining military access for the US and UK.

Trump’s comments on social media suggested he views Diego Garcia as a critical asset in any potential military engagement with Iran. He stated, “Should Iran decide not to make a deal, it may be necessary for the United States to use Diego Garcia… to eradicate a potential attack by a highly unstable and dangerous regime.” This rhetoric raises questions about the implications of the Chagos deal for UK foreign policy and its longstanding commitment to international law, which dictates that the US must seek permission to operate from UK bases.
Legal Considerations and Military Readiness
Under international law, the UK’s role as a host nation complicates military actions taken by the US. If the UK were to allow strikes without a formal request, it could be viewed as complicit in any resultant attacks. This legal framework adds weight to the government’s current position and reflects a cautious approach to military involvement in Iran.
Despite the refusal to permit military operations, UK bases have been used in US-led actions in the past, such as the recent operation to seize the tanker Bella 1. That operation, conducted with the UK’s full support, was justified under international law. However, questions remain about the UK’s broader military commitments and the extent to which it will support US actions that could escalate tensions further in the Middle East.
Political Reactions and Implications
The political ramifications of this decision are already unfolding. Liberal Democrat leader Sir Ed Davey has accused Trump of attempting to intimidate the UK government into allowing the use of military bases for unilateral actions against Iran. He urges Starmer to uphold parliamentary sovereignty by ensuring that any decision regarding military support for the US is subject to a vote.

Starmer himself has stressed the importance of preventing Iran from developing nuclear weapons while simultaneously condemning the Iranian regime for its treatment of protesters. His approach reflects a delicate balancing act between supporting ally commitments and addressing domestic political concerns.
Why it Matters
The refusal to permit US military operations from UK bases not only underscores the complexities of international diplomacy but also highlights the UK’s struggle to navigate its role in global security amidst pressures from powerful allies. As tensions with Iran escalate, the UK’s decisions could have far-reaching consequences for its international standing, its relationship with the US, and the stability of the Middle East. The situation remains fluid, and the coming days will reveal the UK government’s path forward in this high-stakes geopolitical landscape.