The deadline for Prime Minister Keir Starmer's resignation has been pushed back by 3 days, from 14 September 2026 to 18 September 2026, according to the latest Polymarket data.
The shift in the implied resignation date comes as Starmer's position appears to have stabilised in recent weeks. The new deadline of 18 September 2026 suggests an ~86% chance the PM will depart by that point.