Prime Minister Keir Starmer's expected resignation date has been pushed back by one day to 13 September 2026, according to the latest Polymarket data. The shift comes as the odds of Starmer remaining PM on that date have increased to ~86%.
The change follows recent market activity and developments, with the new deadline now set for the day after the previous 12 September 2026 date. Starmer's future as Labour leader continues to be closely watched by political observers.