Britain has reportedly denied the US permission to conduct attacks on Iran from UK military bases, leading to tensions with Washington. While the US President, Donald Trump, appears indifferent to international law, the UK prioritizes adherence to it.

Although the UK hosts thousands of US troops on its bases, authorization for offensive actions from UK shores by US military personnel has historically been the UK’s decision. This authority dates back to the 1951 NATO Status of Forces Agreement and the subsequent Visiting Forces Act.

Recent tensions between the US and the UK have escalated due to Trump’s displeasure over the arrest of Andrew Mountbatten-Windsor by UK police. The UK’s refusal to allow bombers to launch operations from its bases, although not crucial for a mission against Iran, could strain the relationship between Keir Starmer and Trump. This restriction is likely due to the potential illegality of an attack on Iran without provocation from Tehran.

The 1951 regulations define a combat mission as when US aircraft are armed and prepared to strike another country. Thus, any bomber departing from UK bases like RAF Fairford or Diego Garcia and heading towards Iran would be considered part of a combat mission.

International law dictates that a state supporting another state in an internationally wrongful act is held accountable if it had prior knowledge of the circumstances. While the UK permitted the US to launch an attack on Libya in 1986, the current situation calls for the UK to adhere strictly to legalities, allowing support like refueling but not direct attack launches.

The US is pressuring Iran to halt its nuclear and ballistic weapons programs, cease support to proxy forces such as Hezbollah, and improve treatment of opposition protesters. As tensions rise, the US military presence in the Persian Gulf, led by the USS Abraham Lincoln and USS Gerald R Ford, signals potential action against Iran if diplomatic solutions fail.

Trump has threatened strikes on Iran if an agreement is not reached. The UK’s obstruction of any threat towards Iran has strained relations with Washington, necessitating significant diplomatic efforts to mend the rift.