Keir Starmer resigns as UK prime minister and Labour leader

Monday, June 22, 2026Confirmed

World Desk

What we know

British Prime Minister Keir Starmer said Monday outside No. 10 Downing Street that he will resign as Labour Party leader, paving the way for a contest to choose a new prime minister less than two years after Labour’s July 2024 landslide. He said he had informed King Charles III and would remain caretaker prime minister until a successor is chosen.

Starmer said nominations open July 9 and that a new leader should be in place before Parliament returns in September. Former Greater Manchester Mayor Andy Burnham, sworn in Monday as MP after winning the Makerfield by-election, said he would stand; former Health Secretary Wes Streeting endorsed him, raising the chance of a rapid handover.

What's confirmed

Starmer Downing Street statement Monday: resigns as Labour leader; accepts he is not best placed to lead into the next election; remains PM for orderly transition (BBC/AP/Guardian).
Timetable: nominations from July 9; new leader targeted before September return of Parliament; Starmer informed King Charles III (BBC/AP).
Burnham: will put himself forward; sworn in as Makerfield MP Monday; Streeting backs Burnham (BBC/AP/Guardian).
Context: pressure after May local/devolved losses and Burnham’s by-election win; Starmer set to be shortest-serving Labour PM (AP/BBC/Guardian).
Markets: sterling and gilts watched leadership and chancellor uncertainty after the announcement (Reuters).

What's still developing

Whether Burnham faces a contested leadership race or becomes PM unopposed by mid-July.
Cabinet and chancellor choices under any successor and implications for fiscal and energy policy.

Sources

BBC News — Keir Starmer announces resignation as prime minister and Labour Party leader link
AP News — Starmer says he’ll resign as UK prime minister, roiling British politics yet again link
The Guardian — Keir Starmer to step down as prime minister two years after historic election victory link
Reuters — Investors tread rocky road from Starmer exit to next finance minister link