LONDON: Labour mayor of Greater Manchester Andy Burnham has emerged in the past decade as one of Britain’s most recognizable regional leaders, and a persistent thorn in Westminster’s side.Now all eyes are on him as a potential usurper of Prime Minister Keir Starmer, with a historic by-election looming on Thursday.The vote in northwest Makerfield, in what has been a traditionally safe Labour seat, was called when the incumbent Josh Simons stepped down suddenly, gifting Burnham a potential pathway back to parliament.Burnham, whose roots run deep in the area, has admitted the Makerfield by-electi