Politics / 2 MIN READ
Four junior ministers quit, nearly 90 MPs call for his resignation, and analysts put an 80% probability on his ouster this year.
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Starmer out by December 31, 2026?
Polymarket traders now price an 86.5% probability that U.K. Prime Minister Keir Starmer will leave office by December 31, 2026, up 14 percentage points in 24 hours. The move reflects a widening revolt within his own Labour Party after last week’s local elections.
Starmer’s crisis escalated Monday when nearly 90 Labour MPs called for him to resign or set a departure timetable. Four junior ministers quit, and Home Secretary Shabana Mahmood privately urged the prime minister to plan his exit. The trigger was Labour’s loss of roughly 1,500 councillors and control of more than 30 councils in English local elections, with voters defecting to Reform UK on the right and the Green Party on the left.
At a Cabinet meeting Tuesday, Starmer refused to discuss his leadership and declined a private meeting request from Health Secretary Wes Streeting, a potential challenger. Downing Street insists Starmer will fight any formal challenge. Under Labour rules, a leadership contest requires 81 MPs to nominate a single candidate, a threshold the rebels have not yet reached.
Eurasia Group on Monday raised its probability of Starmer being ousted this year to 80%, up from 65%. Analysts see a 35% chance of a forced leadership election by September. The political uncertainty has pushed U.K. 10-year borrowing costs above 5%, with Deutsche Bank strategists warning that a successor may face pressure to loosen fiscal rules and increase gilt issuance.
Potential successors include former Deputy Prime Minister Angela Rayner, Health Secretary Wes Streeting, and Greater Manchester Mayor Andy Burnham, whose return to parliament remains uncertain after Labour’s ruling body blocked his candidacy in January. One MP has offered to vacate a seat for Burnham, but Reform UK or the Green Party could prevail in the resulting by-election.
The market implies a near-certain departure, but the leadership challenge mechanism has not been triggered. The next flashpoint is whether Streeting or another figure can assemble 81 backers. If no formal challenge materializes, the crisis could subside, leaving Starmer in office. The contract closes December 31.
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