The Prime Minister's expected resignation date has been pushed back by 3 days, from 15 September 2026 to 18 September 2026, according to the latest Polymarket data.
The shift in the implied resignation date suggests a ~86% chance that Keir Starmer will remain as PM until at least 18 September 2026, though the final outcome remains uncertain.
Polymarket participants have adjusted their bets on the PM's future in response to the updated market information.