Prime Minister Keir Starmer's expected resignation date has been pushed back by 4 days, from 26 August 2026 to 30 August 2026, according to the latest Polymarket predictions.
The change reflects a shift in market expectations, with the probability of Starmer remaining PM on 30 August 2026 now estimated at ~86%. Analysts say this suggests growing confidence the Labour leader will survive the coming weeks.