The UK’s Prime Minister Keir Starmer has insisted he will fight to stay in his role if a leadership challenge is launched by Andy Burnham. But before any such contest unfolds, Burnham must win a seat in parliament, which he is hoping to do on June 18 in a by-election in the Makerfield constituency. The race is expected to be tight, with Reform UK candidate Rob Kenyon posing a credible opposition to the former Greater Manchester Mayor.