Andy Burnham won the Makerfield by-election on June 19, entering Parliament with a majority of more than 9,200 votes and positioning himself as the most credible internal challenger to Prime Minister Keir Starmer for the Labour Party leadership. Burnham, who has served as Mayor of Greater Manchester since 2017, ran in the seat after incumbent MP Josh Simons resigned to create the vacancy.

The by-election result was widely expected but its scale confirmed Burnham’s continued popularity with the northern English working-class voters that Labour has struggled to hold in recent years. Burnham polled nearly 25,000 votes in total, a significant figure for a constituency covering parts of Wigan and the surrounding area in Greater Manchester.

Burnham ran twice for the Labour leadership before becoming mayor in 2017, and he has consistently polled well in surveys of both Labour members and the wider public throughout his time in Greater Manchester. His profile as a reformer focused on housing, public transport, and public services in the north of England has kept his national standing high even as he stepped back from Westminster politics.

Starmer’s government has faced difficult polling in recent months, and Burnham’s arrival in Parliament sharpens the internal scrutiny the prime minister will face. Burnham has not publicly declared a leadership ambition but his presence at Westminster fundamentally changes the political calculations inside the Labour Party.

The Makerfield seat is in the north-west of England, an area Burnham knows well from his years in Greater Manchester. His decision to run through a by-election route into Parliament, rather than waiting for a general election, signals that he intends to be active at Westminster sooner rather than later.

Burnham is expected to take his seat in the coming weeks. His arrival comes at a moment when Labour faces pressure from multiple directions on housing, NHS waiting times, and the cost of living. The full details of the by-election result are available on the Electoral Commission website. Political observers watching the Starmer-Burnham dynamic will be paying close attention to how the new MP positions himself in his first weeks at Westminster.