Andy Burnham, the former mayor of Greater Manchester, wins the Makerfield by-election and becomes an MP, giving him a formal route to challenge Prime Minister Keir Starmer for Labour leadership. The seat result in northwestern England is decisive: Burnham takes about 55% of the vote, defeating Nigel Farage’s Reform UK, which polls in the mid-30% range, while a third candidate (Restore Britain in one account) trails well behind. Media coverage links the result to growing political volatility for Labour after recent local elections in which Reform gained ground.

Under Labour’s internal rules, Burnham can trigger a leadership contest if he secures the support of 81 Labour MPs and 5% of local Labour branches (including at least two unions), after which party members vote. Another scenario discussed is “coronation” succession if Starmer resigns, though Burnham’s campaign is reported to be discouraging ministers from resigning immediately to avoid forcing Starmer’s hand. Starmer signals he would fight any challenge rather than step aside. Some sources also describe financial market reaction, with UK bond yields rising as political risk increases.

The article also highlights policy questions for Burnham’s leadership, including immigration and how he would approach foreign policy debates related to Gaza, alongside potential pressure from the Greens on the Labour left.