Who will be the next Prime Minister of the United Kingdom to succeed Keir Starmer?

This market will resolve to the individual who is officially appointed as the Prime Minister of the United Kingdom by His Majesty the King, following the resignation of Keir Starmer. The primary authoritative source for resolution will be official announcements from Buckingham Palace and the Prime Minister's Office at 10 Downing Street (gov.uk/government/organisations/prime-ministers-office-10-downing-street). In the event that the Labour Party leadership contest is delayed beyond September 1, 2026, or if Starmer's successor is not confirmed by this date, the market will resolve to the individual officially holding the office of Prime Minister on September 1, 2026, at 23:59:00Z. If the individual appointed is not among the named outcomes, the 'Other' outcome will resolve YES. If no Prime Minister is appointed or a caretaker Prime Minister is in office with no clear successor designated by the resolution date, this market will resolve to 'Other'.