Key Facts

• Sir Keir Starmer is under pressure from Labour MPs and ministers, including Transport Secretary Heidi Alexander, to set a timetable for his departure from Downing Street following Andy Burnham's resounding victory in the Makerfield by-election.
• Andy Burnham won the Makerfield by-election with a 10% increase in Labour's share of the vote and a 9,000-vote lead over the Reform UK candidate, sparking calls from his supporters for a leadership challenge against Sir Keir Starmer.
• Sir Keir Starmer has insisted that he will fight any challenge and not "walk away" from the job, stating that he was elected to serve his country with a mandate secured at a general election two years ago and that there is more he wants to achieve.
• A growing number of Labour MPs, including Jo White, are urging Sir Keir to announce plans to hand power to Andy Burnham, with White suggesting that he should consider his position "very, very carefully" and announce a smooth transition by Monday morning.
• To trigger a leadership contest, a challenger needs the backing of 81 Labour MPs, with Wes Streeting claiming to have enough support to join a contest, although he may step back if momentum swings behind Burnham.