The date by which Prime Minister Keir Starmer is expected to announce his resignation has shifted 2 days earlier, from 9 October 2026 to 7 October 2026, according to the latest Polymarket data.
The change in the implied resignation date comes as the market's probability of Starmer remaining PM by the new date of 7 October has fallen to ~86%. Starmer has faced growing calls from within his own party to step down in recent weeks.