PM Starmer's resignation date moves up by 2 days to 10 Sept 2026

· implied p50 shift

Briefing

The expected resignation date for Prime Minister Keir Starmer has been moved up by 2 days, from 12 September 2026 to 10 September 2026, according to Polymarket data.

The change reflects a shift in market expectations around Starmer's future as Labour leader. The resignation date is now implied to be around ~86% likely to occur by 10 September 2026.