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The British government has firmly stated that it will not permit the United States to utilise UK military bases for potential strikes against Iran, amidst escalating tensions surrounding Tehran’s nuclear programme. This decision comes at a critical moment, as the US intensifies its military posture in the region while simultaneously engaging in diplomatic discussions with Iranian officials.
No Permission Granted for Military Action
British officials have confirmed that the United States has not received approval to operate from RAF Fairford in Gloucestershire or Diego Garcia, a British Overseas Territory in the Indian Ocean, for any military strikes targeting Iran. Reports suggest that US President Donald Trump’s recent criticisms of a proposed deal regarding the Chagos Islands— which would see the territory handed over to Mauritius while leasing back a joint military base—are linked to the UK’s refusal to allow base usage.
A spokesperson for the UK government remarked, “As routine, we do not comment on operational matters.” This ambiguity leaves questions hanging over the UK’s strategic alignment with US military operations.
Pentagon’s Military Readiness
Washington has been increasing its military presence in the region, moving warships and aircraft as part of a broader strategy to pressure Iran into curbing its nuclear ambitions. Trump has stated that the world could expect decisive developments in the next ten days, whether that leads to a diplomatic deal or military action.

Despite the rising stakes, the UK government insists it supports a political resolution to the tensions, emphasizing that Iran must not acquire nuclear weapons. “Our priority is security in the region,” the spokesperson added.
Chagos Islands Deal and Political Fallout
The controversial deal regarding the Chagos Islands has stirred significant political discourse. Sir Keir Starmer, Labour’s leader, engaged in discussions with Trump this week, following the US’s endorsement of the Chagos agreement. The timing of Trump’s comments regarding the potential need for military action against Iran seems to coincide with these discussions, indicating a delicate interplay between diplomacy and military strategy.
In a post on Truth Social, Trump highlighted the significance of Diego Garcia, indicating its potential role in US military operations should diplomatic efforts fail. He stated, “Should Iran decide not to make a deal, it may be necessary for the United States to use Diego Garcia, and the [RAF] Airfield location in Fairford, in order to eradicate a potential attack by a highly unstable and dangerous regime.”
Legal Implications and International Obligations
The UK’s position hinges on longstanding agreements regarding the use of its military bases. Under international law, a nation that supports another in military action could be deemed complicit if it has knowledge of the circumstances surrounding the attack. Thus, the UK must navigate the complexities of international law carefully, especially if it is to justify any future support for US actions against Iran.

The last time RAF Fairford was involved in US military operations was during the seizure of the registered tanker Bella 1 earlier this year—an operation conducted with explicit UK support and deemed lawful under international guidelines. The current tension raises the stakes significantly, as any involvement in a conflict with Iran could carry dire ramifications for the UK’s international standing.
Political Reactions and Future Implications
Political reactions to the developments have been swift. Liberal Democrat leader Sir Ed Davey, a staunch critic of Trump, accused the US president of attempting to coerce the UK into allowing its bases to be used for unilateral military action. “Keir Starmer needs to stand strong and give Parliament a vote on the use of UK bases by US forces,” he asserted, calling for transparency and accountability.
Starmer himself has previously stated that the UK’s focus should be on preventing Iran from developing nuclear capabilities, while also addressing human rights abuses within the country. The juxtaposition of these objectives presents a complex challenge for the UK government, as it seeks to balance international diplomacy with domestic political pressures.
Why it Matters
The refusal to allow US access to British military bases highlights a critical juncture in UK-US relations, particularly regarding military strategy in the Middle East. As tensions with Iran escalate, the UK’s stance could have far-reaching implications, not only for its own security policies but also for its role on the global stage. The government’s ability to navigate this precarious situation will be watched closely, as both diplomatic initiatives and military readiness continue to intertwine in a rapidly changing geopolitical landscape.