PM Starmer's resignation date moves up by 6 days to 18 Sept 2026

· implied p50 shift

Briefing

The Prime Minister's expected resignation date has been brought forward by 6 days, from 24 September 2026 to 18 September 2026, according to the latest Polymarket data.

The shift in the implied resignation date suggests increased market confidence that Keir Starmer will step down as PM before the end of September 2026.