According to the latest Polymarket data, the implied resignation date for Prime Minister Keir Starmer has shifted by 1 day, from 25 Sept 2026 to 26 Sept 2026.
The change in the market-implied exit date suggests a ~86% chance that Starmer will no longer be PM by 26 Sept 2026, up from ~86% for the previous date of 25 Sept 2026.