Recent Labour Party turmoil following disappointing local election results has intensified speculation over Keir Starmer’s future, driving trader consensus toward Andy Burnham as the leading candidate for next prime minister in 2026. Burnham’s strong polling among party members, combined with his allies’ plans for a swift return to Parliament via the Makerfield by-election expected in June, has positioned him ahead of other contenders. Wes Streeting’s recent cabinet resignation and Angela Rayner’s resolution of prior tax matters have added to the list of potential challengers, while the market’s “no change” outcome reflects uncertainty over whether a leadership contest will conclude before year-end. Historical precedent for swift internal shifts and the upcoming by-election timeline further shape these probabilities.