Recent Labour Party turmoil has driven trader consensus toward Andy Burnham as the likeliest next prime minister, following the party's heavy losses in local elections and growing internal pressure on Keir Starmer. Wes Streeting's resignation as health secretary and public criticism of the prime minister's leadership have intensified speculation about a potential contest before the summer recess. Burnham's decision to contest the Makerfield by-election after a sitting MP stepped aside provides a clear route back to Parliament, boosting his positioning among party members. Other figures such as Angela Rayner and Wes Streeting register lower probabilities amid uncertainty over timing and Starmer's stated resolve to remain in post. The market reflects skin-in-the-game assessments of these parliamentary and electoral dynamics rather than any guaranteed outcome.