The Prime Minister's expected resignation date has been brought forward by 3 days, from 19 August 2026 to 17 August 2026, according to the latest Polymarket betting data.
This shift in the implied resignation timeline suggests growing market uncertainty around Keir Starmer's future as PM. The ~86% chance of him leaving by the new date of 17 August 2026 underscores the mounting pressure he faces from within his own party.