British Prime Minister and Labour Party leader Keir Starmer is facing mounting pressure from within his party after Andy Burnham's victory in the Makerfield by-election reignited debate over Labour's future leadership.

Burnham's return to Parliament has fueled speculation about a possible leadership challenge and prompted renewed calls from some Labour figures for Starmer to consider setting out a timetable for his departure.

According to British media reports, Transport Secretary Heidi Alexander recently suggested that Starmer outline a timetable for stepping down to allow an orderly transition. Other senior Labour figures have also been reported as urging the prime minister to reflect on the party's future direction following recent political setbacks.

The pressure intensified after Burnham won the parliamentary by-election in Makerfield, returning the former Greater Manchester mayor to Westminster after nearly a decade away from Parliament. Burnham has previously indicated that he would consider entering a Labour leadership contest if one were to take place.

Several Labour lawmakers have publicly called for an orderly transition, while others have argued that any leadership change should be decided through a formal contest rather than behind-the-scenes negotiations. Potential contenders frequently mentioned in British media coverage include Burnham and former health secretary Wes Streeting.

Despite the growing speculation, Starmer has rejected calls to step aside.

Asked whether he would set a timetable for his departure, Starmer said he had been elected with a mandate to serve the country and intended to continue doing so. He pointed to what he described as achievements in economic stability and immigration policy and said there was more work to be done.

The prime minister also made clear that he would contest any leadership challenge.

"If there is a contest, yes, I will run. I will stand," Starmer said, adding that he was "not going to walk away" from the job. He also urged Labour members to avoid internal divisions and focus on governing rather than party infighting.

Attention is now turning to next week's Cabinet meeting, which is expected to provide a clearer indication of the level of support Starmer retains among senior ministers as Labour weighs its next steps following the Makerfield result.

(With input from agencies)