The date by which Keir Starmer is expected to resign as Prime Minister has been moved up by 3 days, from 26 September 2026 to 24 September 2026, according to the latest Polymarket data.
This shift in the implied resignation date comes as the probability of Starmer stepping down by that date has increased to ~86%. The Prime Minister has faced growing pressure from within his own party in recent months, with several Labour MPs publicly calling for him to resign.