Political earthquake in the UK? Prime Minister Starmer may announce his resignation on Monday, with UK bonds pricing in a change of government ahead of time.
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The British political scene is facing the most tumultuous transfer of power in years.
According to The Observer on the 20th, Prime Minister Starmer is preparing to announce his departure timeline, and senior Labour Party figures expect he may issue a "clear statement" as soon as the 22nd (Monday). This news has tightened nerves in the market—last Friday, the yield on the UK’s 10-year government bond climbed to 4.84%, as investors wait with bated breath for political signals at Monday’s market open.
Starmer’s political predicament intensified last week. Former Greater Manchester Mayor Andy Burnham won the Makerfield by-election by a landslide, securing 54.8% of the vote and defeating the Reform Party candidate by a margin of 9,231 votes, gaining a seat in the House of Commons and paving the way to challenge for party leadership. According to The Observer, citing Labour insiders, Burnham’s supporters claim to have the backing of over 201 Labour MPs, more than half of the parliamentary party, making Starmer’s position increasingly difficult.
UK Transport Secretary Heidi Alexander publicly urged Starmer on the 19th to set a timeline for his departure. Although Starmer said that day he would stand in any leadership contest and reaffirmed he would not "just walk away", it was reported he spent the weekend at the countryside retreat Chequers with his wife, giving careful thought to his political future.
The market is already pricing in political risks
The bond market reacted first. The yield on the UK’s 10-year government bond rose about 9 basis points last Friday to 4.84%, with traders taking Burnham’s victory, domestic political uncertainty, and possible fiscal policy shifts due to future leadership changes all into account.
With markets closed over the weekend, the next critical window will be Monday at the open. If Starmer issues a departure statement then, the news will directly affect market trading. Burnham is set to be sworn in as an MP on Monday, and will meet Starmer earlier in the week, with a Cabinet meeting scheduled for Tuesday.
Labour insiders expect the transfer of power won’t create an immediate vacuum, but rather a "gradual and orderly exit"—the most likely scenario is that the handover will be set for around the party conference in September.
How Starmer’s authority collapsed
Starmer’s political predicament did not form overnight. The erosion of his authority can be traced back to a personnel decision in December 2024—he appointed Peter Mandelson as ambassador to the United States, despite Mandelson’s well-known long-term association with the late sex offender Jeffrey Epstein.
Mandelson was dismissed from his ambassador role in September 2025, and later arrested on charges of "misconduct in public office" for allegedly passing sensitive government information to Epstein during the 2008-2010 financial crisis. Mandelson denies wrongdoing and has not been formally charged; police investigation continues. Starmer initially claimed Mandelson concealed their friendship during the appointment, but reports later showed he was aware of it.
This triggered a chain reaction: Starmer’s chief of staff Morgan McSweeney resigned this February, a senior Foreign Office official followed, and the government continued to lose personnel under pressure from file disclosures, review disputes, and integrity investigations.
Party infighting and mounting pressure
Momentum for internal division within Labour is accelerating. Starmer’s former Shadow Justice Secretary, Lord Falconer, told the BBC that Starmer "has completely lost authority, because everyone thinks Andy Burnham is about to launch a leadership challenge, and everyone thinks he will win."
The unions have also made their position clear. Sharon Graham, general secretary of Unite, bluntly stated "Starmer clearly needs to go" and called for an orderly transfer with a defined timeline, while also urging discussion of Labour policy priorities.
Former Health Secretary Wes Streeting is seen as another potential contender within the party. According to The Observer, he has rented an office for 40 staff as campaign headquarters and received two £50,000 donations from key Labour donor Fran Perrin. However, some senior Labour figures believe Streeting may ultimately choose to make a deal with Burnham rather than directly challenge his momentum.
Burnham: The "King of the North" awaiting entry
Burnham’s victory speech was ambitious, even though he has not formally declared his candidacy. He told supporters, "Tonight, maybe—just maybe—could be a turning point," warning Labour this is "the last chance for change" and "there won’t be a second time."
Under Labour rules, any challenger needs support from 20% of Labour MPs (currently about 81), as well as necessary backing from local parties and affiliated groups, to launch a formal challenge. Burnham’s supporters claim their numbers far exceed this threshold.
Currently, Number 10 Downing Street continues to dismiss resignation rumors as "speculation," and Starmer’s team insist he will face any challenge. But the political reality is severe: Burnham has won a seat, his allies claim to have enough votes, Cabinet members and unions are shifting, and the ongoing threat from the Reform Party has made more Labour MPs believe only Burnham can respond effectively.
If Starmer takes the stage on Monday to announce a departure timeline, it will mark the end of a remarkable political journey—from a landslide victory less than two years ago to a forced exit, opening the door for the "King of the North" to enter.
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