Who replaced Keir Starmer as Labour leader?

Andy Burnham. Keir Starmer resigned as Labour leader on 22 June 2026, and Burnham - who returned to Parliament by winning the Makerfield by-election on 18 June - declared his candidacy the same day. He was elected unopposed at a special conference on 17 July 2026, having received 379 nominations, about 94% of the 403-strong Parliamentary Labour Party, against a threshold of 81. Catherine West received a single nomination from Neil Coyle, far short of the 81 needed to reach the ballot and not enough to be eligibly nominated, so no members' ballot was held.

How does Labour elect a new leader?

To reach the ballot a candidate must be nominated by 20% of Labour MPs - 81 of the 403-strong Parliamentary Labour Party - and then by either 5% of constituency Labour parties or three affiliates (at least two of them trade unions) making up 5% of affiliated membership. The contest is then decided by one member, one vote under the Alternative Vote system.

Who votes in the Labour leadership election?

Full party members and affiliated supporters vote, each with one vote. The registered supporters scheme, which previously let people pay a one-off fee to vote, was abolished in 2021. The freeze date is 25 June 2026, so members who joined on or before 25 December 2025 (six months' continuous membership) are eligible.

Did Andy Burnham become Labour leader unopposed?

Yes. Every figure floated as a possible rival endorsed Burnham or ruled out standing - the last, Al Carns, on 7 July - leaving him the only candidate. No rival was eligibly nominated by the PLP close on 15 July, and a special conference on 17 July 2026 confirmed him as leader unopposed, without a members' ballot, as Gordon Brown was in 2007.

When will the UK have a new Prime Minister?

Andy Burnham was elected Labour leader on 17 July 2026, but by convention a new leader does not become Prime Minister the same day. Keir Starmer stays on as caretaker Prime Minister until the handover, expected on 20 July 2026, when Burnham is expected to be appointed by the King.

Westminster · Labour

Labour Leadership Election 2026

Keir Starmer resigned and Andy Burnham was elected unopposed to replace him on 17 July 2026. The result, the timeline, the candidates, and what it took to win.

The contest timetable

The schedule set by Labour's National Executive Committee. Burnham was the only eligibly nominated candidate, so the special conference on 17 July confirmed him unopposed and the contested-race steps - CLP nominations and the August members' ballot - were not required.

The nomination maths

To reach the ballot, a candidate must be nominated by 20% of Labour MPs - 81 of the 403-strong PLP - and then by 5% of constituency parties or three affiliates. The bars below are a historical snapshot of where MPs stood before Starmer resigned, which is what forced the contest.

Candidates

Who stood, who was talked about, and the outgoing leader. Burnham was the only candidate to be eligibly nominated; everyone else listed either endorsed him, ruled out standing or fell short of the 81-MP threshold.

Timeline

How Labour elects a new leader

MP nominations

A candidate must be nominated by at least 20% of the PLP - 81 MPs - to be validly nominated. MPs may nominate themselves or one other. The threshold was raised from 10% to 20% at the 2021 party conference, so it is now the same for a vacancy as for challenging a sitting leader.

Affiliate and CLP nominations

Candidates who clear the PLP threshold also need nominations from at least three affiliates (at least two of them trade unions), or, failing that, from 5% of constituency Labour parties.

What if only one candidate qualifies?

If a single candidate is validly nominated, a leadership special conference can confirm them as leader unopposed, with no members' ballot. That is what happened here: the special conference on 17 July confirmed Burnham as the only eligibly nominated candidate. By convention a new leader does not become Prime Minister on the same day, so the handover to No 10 follows a few days later - here, expected on 20 July. Gordon Brown became leader this way in 2007, taking over as PM three days after being confirmed.

Who votes, and how?

A contested election is decided by one member, one vote under a single-round preferential (Alternative Vote) system: if no candidate clears 50% on first preferences, the lowest is eliminated and votes redistributed until one passes 50%. The electorate is full members and affiliated supporters; the registered supporters scheme, which let people pay a fee to vote, was abolished in 2021. Voting is electronic, with postal ballots for those without email.

Who is eligible to vote?

Members with six months' continuous membership before the timetable was announced can vote. The freeze date is 25 June 2026, so members who joined on or before 25 December 2025 qualify. Affiliated supporters qualify under separate criteria.