The date by which Prime Minister Keir Starmer is expected to resign has been pushed back by 4 days, from 19 Aug 2026 to 23 Aug 2026, according to the latest Polymarket data.
This shift in the implied resignation timeline suggests the PM is now less likely to step down by the earlier date, with the market now pricing in around an ~86% chance of Starmer remaining in office on 23 Aug 2026.