Following Labour’s disappointing results in the May 2026 local elections, mounting pressure from MPs and unions has intensified calls for a leadership contest to replace Keir Starmer. Senior figures including Wes Streeting, who resigned as health secretary, and Greater Manchester mayor Andy Burnham, who has secured a path to contest the Makerfield by-election, have emerged as potential challengers alongside Angela Rayner. Starmer has rejected demands to step down and stated he would contest any ballot, while party rules allow a challenge with sufficient nominations. Upcoming developments, including the Makerfield by-election outcome and possible autumn timing pressures ahead of the next general election, remain central to assessments of when a formal leadership election process could be triggered.