🕒 Last Updated: 21 May 2026 – Odds and market information correct at time of last update. Political betting markets move quickly; please check with your bookmaker for current prices.
Keir Starmer is now as short as 1/7 with Ladbrokes to leave Downing Street in 2026, a dramatic move from 4/9 in April as internal Labour pressure has reached a critical level. The Prime Minister’s reset speech at Coin Street Community Centre failed to steady the party, with Hornsey and Friern Barnet MP Catherine West launching a formal stalking-horse leadership bid within hours of it concluding.
What date will Keir Starmer resign as Labour leader?
| Exit Window | Odds | Implied Probability |
|---|---|---|
| 2026 (any point) | 1/7 | 87.5% |
| July to September 2026 | 4/6 | 60.0% |
| 2027 | 4/1 | 20.0% |
| October to December 2026 | 5/1 | 16.7% |
| 2028 or later | 11/1 | 8.3% |
William Hill price Starmer at 2/7 to leave as Labour leader before the end of the year, with July to September emerging as the most likely exit window at 4/6. On Oddschecker, 93% of all bets placed on the exit date market backed a 2026 departure, reflecting near-unanimous market opinion on a sitting prime minister less than two years into his first term.
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The pressure has been building since Labour’s catastrophic local elections in May, when the party lost 1,496 councillors to Reform and the Greens. Between 90 and 97 Labour MPs have publicly called for Starmer to resign or set out a timetable for his departure, including former Shadow Chancellor John McDonnell and six ministerial aides. Home Secretary Shabana Mahmood is reported to have asked the Prime Minister directly to provide a timeline for leaving office. Wes Streeting has already resigned as Health Secretary, with his resignation letter stating he had “lost confidence” in Starmer’s leadership.
The stalking-horse bid by Catherine West adds a formal mechanism to what had previously been a campaign of briefings and public statements. Under Labour Party rules, a leadership contest can begin if the leader resigns voluntarily or if a challenger secures nominations from 20% of Labour MPs, currently 81 MPs. Whether West can reach that threshold remains the key near-term question.
Despite the pressure, Starmer has insisted he will not walk away. Senior minister Darren Jones told reporters it was “not inevitable” the Prime Minister would resign, and the bookmakers’ exit window of July to September suggests the market believes a formal challenge or voluntary handover is more likely after the Makerfield by-election on 18 June than before it. A Burnham win would sharpen the leadership picture considerably.
For the latest on who could replace him, see the next Prime Minister odds and the next Labour leader market, where Andy Burnham is now the outright favourite.
