British Prime Minister Keir Starmer has defended the United Kingdom’s decision not to join U.S.-led military strikes on Iran, emphasizing that UK forces will not be committed to actions deemed unlawful.

Starmer stated, “It is my duty to judge what is in Britain’s national interest. That is what I have done. And I stand by it.” He added that military personnel deserve better than being involved in operations that could violate international law. Observers say the UK is underscoring its commitment to legal norms in global conflicts.

The move has drawn criticism from U.S. President Donald Trump, who expressed disappointment that the UK initially blocked the use of British military bases for potential operations against Iran. Trump described the hesitation as unprecedented, noting concerns over legality.

Reports indicate that U.S. operational plans had considered key UK facilities, including the joint base at Diego Garcia and RAF Fairford, a central hub for America’s heavy bomber fleet in Europe. Under bilateral defence agreements, the U.S. may only use these bases with prior UK approval.

Sources suggest the British government’s caution stems from legal obligations under international law, which can hold states accountable if they knowingly support actions later judged unlawful.



