Overview
- Keir Starmer announced his resignation on Monday, June 22, 2026, and will stay on as caretaker prime minister until Labour selects a successor.
- Andy Burnham confirmed he will run for the leadership after returning to Parliament in last week’s Makerfield by‑election and is widely viewed as the front‑runner.
- Nominations open on July 9 under Labour rules that require a candidate to have backing from one‑fifth of Labour MPs and then affiliate or constituency support.
- Wes Streeting has publicly backed Burnham, increasing the chance of an uncontested mid‑July elevation, though a full contest could stretch to September and require a members’ vote.
- The change will trigger a Greater Manchester mayoral by‑election, shift Labour’s likely policy emphasis toward Burnham’s ‘Manchesterism,’ and intensify the fight with Nigel Farage’s Reform UK, which leads national polls.