Starmer rival Burnham wins Makerfield by-election as Labour leadership speculation grows

Labour's Greater Manchester mayor Andy Burnham won the Makerfield by-election to return to the House of Commons. His defeat of Reform UK's Rob Kenyon strengthens his standing as a potential successor inside the party. The contest had been watched as a key test of whether Sir Keir Starmer's internal position was wearing thin.

Commentators in London read the result as the start of a phase in which leadership challenges to Starmer will intensify in coming months. The Liberal Democrats and Greens held their share, preventing the seat from going to Reform UK, while Burnham, long a public-profile figure, leaned into housing and health policy during the campaign. Party insiders say allies of his could see movement inside the cabinet too.

Downing Street congratulated Burnham on the win, but said the prime minister would not comment on the leadership conversation. The next regular party conference is shaping up as an early forum likely to surface the internal arguments between Burnham, the shadow foreign secretary and other heavyweights.