Britain's Prime Minister Keir Starmer hosts a roundtable meeting for leaders of NHS Trusts, at 10 Downing Street in London, Britain June 9, 2026. BEN STANSALL/Pool via REUTERS LONDON - British Prime Minister Keir Starmer on Friday rejected the idea that he had lost authority in his role, and said he would fight to keep his job, adding that anyone who wanted to replace him would have to deal with the same financial constraints.