If no challenger emerges, as expected, Burnham will be confirmed as Labour leader next week before taking office as prime minister on July 20Andy Burnham is on the brink of becoming Britain's next prime minister after securing overwhelming backing from Labour MPs to replace Keir Starmer as party leader.The former Greater Manchester mayor has been nominated by 322 Labour MPs, making him the only declared candidate in the leadership contest, BBC reported. He is just one nomination short of the 323 required to make it mathematically impossible for a rival to enter the race. Several MPs who were unable to vote on Thursday have indicated they will back Burnham once Parliament resumes.If no challenger emerges, as expected, Burnham will be confirmed as Labour leader next week before taking office