The expected resignation date for Prime Minister Keir Starmer has been pushed back by 2 days, from 14 September 2026 to 16 September 2026, according to the latest Polymarket data.
The shift in the implied resignation date comes as the political situation around Starmer's leadership continues to evolve. Traders on Polymarket now see around ~86% probability that Starmer will step down as PM by the new 16 September deadline.