The Prime Minister's resignation date has been moved 3 days earlier, from 25 September 2026 to 22 September 2026, according to the latest Polymarket data. The shift in the implied resignation date suggests a ~86% chance Starmer will step down as PM by that date.
The change in the projected exit date comes as the political situation around Starmer's leadership continues to evolve. Observers will be closely watching the coming weeks and months to see how this impacts the Prime Minister's position.