The Prime Minister's expected resignation date has shifted 3 days earlier, from 25 September 2026 to 22 September 2026, according to betting markets on Polymarket.
The change comes as the probability of Starmer resigning by the new 22 September date is estimated at ~86%, up from ~83% for the previous 25 September date.
Polymarket traders are now pricing in an increased likelihood of the Prime Minister announcing his resignation in the coming weeks.