UK's Starmer resigns as Labour rebellion, poll slump force him out

U.K. Prime Minister Keir Starmer said Monday he will step down as Labour leader and prime minister, ending a tenure that saw one of the party's largest-ever parliamentary majorities unravel in under two years.

Starmer's announcement from outside 10 Downing Street, just after 9:30 a.m. London time, follows heavy losses in May's local elections and an open revolt from his own lawmakers. Labour's former Greater Manchester mayor Andy Burnham won a decisive by-election on June 18, setting up a leadership challenge that Starmer said he accepted "with good grace."

Starmer will remain in post until the contest concludes. The pound slipped 0.19% to $1.3207. U.K. 10-year gilt yields held flat at 4.8452%.

In a short, emotional speech, Starmer called his time in Downing Street the "proudest moment of my life" and pointed to restored international reputation, inward investment, and workers' rights reforms. He conceded that colleagues had been asking whether he could lead them into the next general election. "I have heard the answer from my parliamentary party," he said. "I will resign."

Discontent within Labour ranks has been building for months. Starmer and Finance Minister Rachel Reeves faced internal fury over fiscal policy, welfare changes, and a controversial decision to appoint Peter Mandelson – a figure tied to the late sex offender Jeffrey Epstein – as U.S. ambassador. An Ipsos poll released Friday showed 52% of the British public wanted Starmer out, up from 47% in May.

Gilt yields jumped Friday after Burnham's by-election win. Burnham has since tried to soothe markets, distancing himself from earlier comments that the U.K. was "in hock to the bond markets."