The Prime Minister's expected resignation date has been pushed back by 3 days, from 12 September to 15 September 2026, according to the latest Polymarket betting data.
The delay suggests the odds of Starmer remaining as PM on 15 September have increased to around ~86%, up from the previous estimate of him resigning by 12 September.
The shift in expected resignation date comes amid ongoing political uncertainty and speculation around the Prime Minister's future.