British Prime Minister Keir Starmer has just shared a video statement on X.
He says the UK is going to allow the US to take defensive action from British military bases.
"The US has requested permission to use British bases for that specific and limited defensive purpose," he says in a pre-recorded video.
"We have taken the decision to accept this request to prevent Iran firing missiles across the region killing innocent civilians, putting British lives at risks and hitting countries that have not been involved."