Why Burnham Becoming Prime Minister Looks Increasingly Likely

TL;DR

Andy Burnham is positioning to challenge Keir Starmer for Labour leadership after ally Josh Simons vacated the Makerfield seat, giving Burnham a likely path to Parliament.

Key Points

• 1.Labour came closest to toppling Starmer since the 2024 election. Nearly 100 Labour MPs — a quarter of the parliamentary party — demanded Starmer set a resignation timetable, followed by high-profile ministerial resignations including Jess Phillips and Wes Streeting.
• 2.Burnham's path to parliament runs through the Makerfield by-election. Burnham ally Josh Simons resigned his Makerfield seat explicitly to allow Burnham to stand; the NEC approved Burnham's candidacy, with the by-election expected on June 18.
• 3.Makerfield is a difficult but winnable seat for Burnham specifically. Without Burnham, analysis gives Labour roughly 0% chance; with Burnham, Cvation estimates a 67% win probability with Labour at 45% vs Reform at 42%, though Reform is expected to contest aggressively.
• 4.Burnham is walking a policy tightrope to appeal to conflicting voter groups. He reversed his pro-EU rejoining stance from the Labour conference and confirmed he will keep Rachel Reeves's fiscal rules, drawing criticism from the left but signaling credibility to bond markets.
• 5.A Makerfield win would likely make Burnham Prime Minister by summer. Given his strong popularity among Labour MPs and the wider membership, winning the seat would make him eligible to challenge Starmer — a contest he is widely expected to win.