Prime Minister Keir Starmer said he would resign, and a new leader will be chosen before Parliament returns in September, which will give Britain its seventh leader in 10 years.

Starmer, less than two years after winning a big election, said his party wanted him to leave.

Starmer said his party asked if he was the best person to lead them into the next election, and he accepted their answer.

Starmer thanked his colleagues and paid tribute to his family.

The pound and UK government bonds did not change much after Starmer's announcement.

The threat to Starmer's leadership grew when Andy Burnham won a parliamentary election, beating a candidate from Nigel Farage's Reform UK party.

Burnham's win gave Labour lawmakers hope that he could improve the party's fortunes.

Starmer had said he would stand in any formal leadership contest, but that changed over the weekend.

Nigel Farage called for an immediate election on social media.

Farage said Labour cannot just put another politician in charge.

There was a lot of support for removing Starmer.

The party's governing body will decide the timeline, but Starmer said nominations would open on July 9.

If there is a contest, it should be finished by the time Parliament returns on September 1.

The new prime minister will be Britain's seventh since the Brexit vote.

Liberal Democratic Leader Ed Davey said the British people are tired of changing prime ministers without anything improving.

The high number of prime ministers in a short time shows how hard it is to keep voters happy.

The change in leadership is not without risks.

Andy Burnham won a byelection, which could lead to a challenge to Keir Starmer.

The British defence minister quit Starmer's government, criticizing his policies.

Andy Burnham has not yet said what he would do about foreign affairs, the economy, and defence.

To replace Starmer, a candidate needs the support of 20% of Labour members of Parliament.

If more than one candidate qualifies, all Labour Party members and affiliates will vote for the winner.

Starmer struggled to deliver economic growth and improve public services.

A poor performance in local elections led many Labour lawmakers to call for Starmer's resignation.

Andy Burnham was a health minister from 2009-2010 and failed in two previous leadership contests.

The next prime minister will face big domestic challenges.

Britain has high borrowing costs due to its debt and struggles to cut spending.