The date by which Prime Minister Keir Starmer is expected to announce his resignation has been pushed back by 3 days, from 14 September to 17 September, according to Polymarket data.
The new date of 17 September is now the market's best estimate of when Starmer will step down as Labour leader and PM, reflecting a shift in expectations on the timing of his departure.
The change comes as Starmer's future remains uncertain, with ~86% of traders betting he will have resigned by the new date.