The date by which Prime Minister Keir Starmer is expected to announce his resignation has been moved forward by 2 days, from 1 October 2026 to 28 September 2026, according to the latest Polymarket predictions.
The shift in the implied resignation date comes as Starmer faces mounting pressure from within his own party. The Prime Minister's position has an ~86% chance of ending by the revised date, up from ~84% previously.