The small constituency of Makerfield in northwest England has found itself in the eye of the storm of British politics with a by-election on Thursday that will not only produce a new member of parliament but could also pave the way for a new prime minister.The by-election was triggered last month when the previous MP, Josh Simons, stood down to allow Manchester Mayor Andy Burnham to contest the seat. If Burnham wins, he intends to challenge UK Prime Minister Keir Starmer for the leadership of the ruling Labour Party.Recommended Stories list of 4 itemsend of listStarmer is facing mounting pressure to step aside following dismal council election results last month and this week’s resignation of Secretary of State for Defence John Healey and Armed Forces Minister Al Carns over the United Kingdom’s defence budget.Seeking to derail Burham’s hopes for the Labour leadership, however, is far-right Reform UK candidate Robert Kenyon, whose campaign has been dogged by controversy over alleged sexist and misogynistic social media posts but who remains within striking distance in the polls. Reform came second at the last election in Makerfield, however, and are seen as presenting a real challenge to Labour, which has held the seat since its creation in 1983.Here’s a closer look at the race, why it matters and how its consequences could extend far beyond Makerfield.Why is a by-election happening in Makerfield?Despite winning the 2024 general election in a landslide, Labour’s popul …