Andy Burnham was the only candidate to reach the ballot, with 379 nominations from 94% of the parliamentary party; he was declared leader unopposed on 17 July and became Prime Minister on 20 July.
The nominations market resolves on the Labour Party's official statement at the close of nominations on 16 July 2026: more than one validly nominated candidate resolves YES. Nomination counts and candidate lists are taken from the Labour Party's published returns, cross-checked against BBC and PA reporting.
Five times in the last fifty years a British prime minister has resigned mid-term and the governing party chose the successor. The record is split. Three ended with one candidate taking over unopposed. Two went to a full vote.