Prime Minister Sir Keir Starmer "will not walk away" after Andy Burnham said he will challenge him for the Labour leadership if he wins the Makerfield by-election.Downing Street said the process for challenging the Labour leader "has not been triggered", and that the country expects ministers to "focus on governing".

Prime Minister Sir Keir Starmer "will not walk away" after Andy Burnham said he will challenge him for the Labour leadership if he wins the Makerfield by-election.Downing Street said the process for challenging the Labour leader "has not been triggered", and that the country expects ministers to "focus on governing".