The prime minister will stay on as a caretaker while Labour, not the country, picks Britain's seventh leader in a decade.

The question in Westminster is no longer whether Keir Starmer can hold on, but how he leaves — and whether Andy Burnham can convert a by-election landslide into the leadership.

Andy Burnham's Makerfield landslide has emboldened Labour rivals, and reports suggest Keir Starmer could announce a resignation timetable within days.