British Prime Minister Keir Starmer resigned on Monday after losing the support of his Labour Party MPs. Former Manchester Mayor Andy Burnham has emerged as the frontrunner to succeed him, receiving an early endorsement from former Health Secretary Wes Streeting to lead the government.
Why did Keir Starmer resign as Prime Minister?
Keir Starmer announced his resignation during a speech at 10 Downing Street, stating he had informed King Charles III of his decision. Starmer told senior ministers that his departure follows a loss of confidence from his own parliamentary group.
According to the Prime Minister, the decision stems from a need to address whether he is the “right person” to lead the Labour Party into the next general election. Starmer described the decision as an effort to put the country first, despite the emotional difficulty of the departure.
Political analysts point to several factors that weakened Starmer’s authority. His tenure, which began with a landslide victory in July 2024, faced immediate challenges including:
- Frequent retreats from previously promised policy positions.
- Declining public popularity ratings.
- A series of high-profile ministerial resignations.
- Significant losses in local and regional elections in May.
The rise of the right-wing Reform UK party, which currently leads national opinion polls on immigration, has also placed unprecedented pressure on the Labour leadership. Starmer’s ability to counter this surge was a primary concern for his MPs.
Who is Andy Burnham and how will the leadership transition work?
Andy Burnham, a veteran Labour politician and former Mayor of Manchester, is the most likely candidate to take over the premiership. Burnham confirmed his intention to run for the party leadership via a post on X, calling for an “orderly and responsible” transition of power.
Under Labour Party rules, the leader must be a sitting Member of Parliament. Burnham, who has previously sought the leadership on two occasions, is expected to face little resistance. This expectation is bolstered by former Health Secretary Wes Streeting’s decision to support Burnham rather than pursue his own candidacy.
The Leadership Contest Timeline
The Labour Party’s National Executive Committee (NEC) is responsible for managing the succession. Starmer has requested a strict schedule to ensure stability. The key dates for the transition are:
- July 9: Nominations for the party leadership officially open.
- July 16: The nomination period closes.
- July 17 or 18: The likely date for the new Prime Minister to take office, provided Burnham remains unopposed.
Starmer confirmed he will remain in his position as Prime Minister until the leadership competition concludes to ensure an organized transfer of authority.
How does this compare to Starmer’s initial mandate?
The current political instability stands in stark contrast to the momentum Starmer held just months ago. The following table compares the political standing of the Labour leadership from the 2024 election to the current period:
| Metric | July 2024 (Election) | Current Status |
|---|---|---|
| Party Standing | Landslide victory over Conservatives | Loss of MP confidence |
| Primary Challenge | Conservative government | Rise of Reform UK |
| Internal Unity | High (following 14 years in opposition) | High level of ministerial resignations |
This rapid shift suggests that the Labour Party is prioritizing internal stability to prevent further electoral erosion to Reform UK. The transition to Burnham represents an attempt to reset the party’s image before the next general election.
Frequently Asked Questions
When will the new Prime Minister take office?
If Andy Burnham is the only candidate, he is expected to take office on July 17 or 18.

Why is Andy Burnham the favorite to win?
Burnham has secured the support of key figures like Wes Streeting, which may prevent a contested race.
What happens to the current government during the transition?
Keir Starmer will remain in office as Prime Minister until a new leader is elected to ensure a smooth handover of power.
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