Keir Starmer Resigns as Prime Minister Amid Labour Leadership Crisis

Keir Starmer has resigned as UK Prime Minister after Labour MPs concluded he could not lead the party to the next election, marking the shortest tenure of a Labour leader in history and setting up a leadership contest that will conclude by the end of summer recess. The move follows a string of resignations, policy U-turns, and a crushing defeat in May’s local elections, which saw Labour lose control of key councils. Former health secretary Wes Streeting, the first Cabinet minister to quit, has already backed Andy Burnham as the frontrunner to succeed Starmer.

Starmer announced his resignation on Monday, stating he had “heard the answer of the parliamentary party” that he was not the right person to lead the party into the next general election. Nominations for a new leader will open on July 9, with a replacement expected by the end of August, according to Labour’s internal rules. The resignation comes just hours after former US President Donald Trump posted on Truth Social that Starmer would step down, citing “failures” on immigration and energy policy, including his refusal to open new North Sea oil fields.

The collapse of Starmer’s premiership—less than two years after he took office—paves the way for the seventh UK Prime Minister in a decade, a record of instability that has unsettled markets and raised questions about Labour’s economic credibility. His tenure became untenable after a series of high-profile resignations, including defence secretary John Healey, who quit last week over a row with Starmer’s chancellor, Rachel Reeves, about defence spending cuts. Other senior ministers, including foreign secretary Yvette Cooper, home secretary Shabana Mahmood, and energy secretary Ed Miliband, had privately urged Starmer to set a timetable for his departure in recent weeks.

Burnham, who won a by-election in Makerfield last week with over 50% of the vote, has emerged as the most likely successor. In his victory speech, he warned Labour MPs that the party faced a “final chance to change” or risk losing the next election. “Everyone knows politics isn’t working,” Burnham said. “Tonight could, just could, be the turning point.” His return to Parliament as an MP—after serving as mayor of Greater Manchester—has reinvigorated his profile, though his leadership bid will face scrutiny over his past record, including a 2017 scandal involving a £10,000 loan from a property developer.

The leadership race will unfold against a backdrop of economic uncertainty, with the UK’s public finances under pressure and the Bank of England warning of stagnant growth. Reeves, the first female chancellor, has already faced criticism for her handling of the budget and her clashes with Healey, who accused her of “betraying” Labour’s defence commitments. Financial markets have reacted cautiously, with sterling weakening slightly and gilt yields rising as investors assess the political risks. The FTSE 100, however, showed little immediate reaction, reflecting a broader market focus on corporate earnings rather than political turmoil.

What happens next?
Labour’s leadership contest will begin formally on July 9, with MPs expected to narrow the field to two candidates by July 23. A final vote among party members will determine the winner by August 26, just before the summer recess. Burnham’s advantage lies in his grassroots support and his ability to rally disaffected Labour voters, but he will need to address concerns about his past decisions and his relationship with Starmer’s team. Meanwhile, Reeves, the chancellor, has remained publicly neutral, though her future in the next government is uncertain if Burnham wins.

Why does this matter for the UK economy?
Starmer’s resignation accelerates a leadership transition that could delay key policy decisions, including the autumn budget and potential tax reforms. His successor will inherit a challenging economic outlook, with inflation still above the Bank of England’s target and borrowing costs elevated. The market’s reaction will hinge on whether Burnham or another candidate can restore confidence in Labour’s economic plan. Analysts at Goldman Sachs have noted that political instability in the UK has historically led to higher borrowing costs, a risk that could resurface if the leadership contest drags on.

How does this compare to past Labour leadership crises?
Starmer’s exit is the fastest for a Labour leader since Tony Blair resigned as party leader in 2007, though his tenure as PM was shorter than Gordon Brown’s 10-year stretch. The 2015 leadership contest between Ed Miliband and Andy Burnham—where Miliband won by just 20,000 votes—highlighted the party’s internal divisions. This time, Burnham’s return as a candidate could reignite those tensions, particularly if he challenges Reeves’ economic policies. The contrast with Blair’s era is stark: then, Labour was dominant; now, it faces the prospect of a fourth consecutive term in opposition.

What are the risks for Andy Burnham’s leadership bid?
Burnham’s path is not without obstacles. His past association with the “Mandelson scandal” in 2017—where he was accused of accepting a £10,000 loan from a property developer linked to a controversial housing deal—could resurface. Additionally, his record as mayor of Greater Manchester, where he oversaw a £1.2 billion budget deficit, has drawn criticism from some economists. Labour’s left wing, which has grown more influential under Starmer, may also resist his more centrist approach. If he wins, he will need to quickly reassure markets that Labour’s economic strategy remains on track.

What does Donald Trump’s involvement mean?
Trump’s premature claim on Truth Social that Starmer would resign underscores the US president’s continued influence in UK politics, even after leaving office. His criticism of Starmer’s energy policy—particularly the decision to block new North Sea oil licences—aligns with his broader climate skepticism. While Trump’s remarks carry no official weight, they reflect a transatlantic divide over energy policy that could resurface if Labour reverses its stance. The UK’s North Sea oil and gas sector, which employs over 100,000 workers, has already warned of job losses if exploration is further restricted.

What’s next for Labour’s MPs?
With Starmer gone, Labour’s parliamentary party will turn inward to select a new leader. The process will be watched closely by opposition parties, particularly the Conservatives, who may seek to exploit any perceived weakness in Labour’s unity. The resignation of Healey and Streeting—both of whom had been considered potential leaders—leaves Burnham as the clear front-runner, though other names, including Cooper and Miliband, could yet enter the race. The coming weeks will be critical in determining whether Labour can present a united front ahead of the next general election.