Andy Burnham wins Makerfield by-election, opening door to Labour leadership challenge against Keir Starmer

The Makerfield by-election

Andy Burnham, the former mayor of Greater Manchester, secured 54.8% of the vote in the Makerfield by-election held on 19 June. His Reform UK opponent Robert Kenyon trailed with 34.5%, a gap of nearly 10,000 votes from roughly 45,000 cast. The result gave Labour an increased share of the vote in the constituency, up about 10 percentage points from 45% at the 2024 general election.

“Tonight could be the turning point. This is the last chance for change.”

Burnham had stepped down as mayor of Manchester to stand for the seat, which Labour has held for over 120 years. The by-election was triggered by a vacancy and became a test of his personal appeal against the rising Reform UK.

Andy Burnham (Labour)54.8

Robert Kenyon (Reform UK)34.5

Other candidates10.7

Andy Burnham (Labour)

54.8

Robert Kenyon (Reform UK)

34.5

Other candidates

10.7

Data from the article text

Burnham's path to the leadership

The win removes a key hurdle for any Labour challenger to Starmer: only sitting MPs can stand for the party leadership. Burnham, who lost two leadership contests more than a decade ago, now fulfills that requirement. He will need the support of 81 Labour MPs to trigger a formal contest. Culture Secretary Lisa Nandy said she was confident those numbers could be secured.

“I have unfinished business at Westminster. I will make Makerfield synonymous with the change this country needs.”

Burnham's speech stopped short of an outright declaration, but his language and the momentum behind him signal an imminent challenge. The 'King of the North' has built a reputation on public service reform in Manchester, and many MPs see him as the party's best hope to recover from a slump in polls and poor local election results in May.

2024 general election45%

2026 by-election54.8%

2024 general election

45 %

2026 by-election

54.8 %

Data from the article text

Starmer stands firm

Prime Minister Keir Starmer congratulated Burnham on his 'very good' victory but insisted he would not step aside. He told reporters that he would be a candidate in any leadership contest, dismissing calls from cabinet ministers who, according to British newspapers, told him that 'his time is up'.

“I will not run away. If there is a challenge, I will fight it.”

The prime minister took four hours after posting a brief congratulatory message on X before making on-camera remarks. His stance leaves the party facing a prolonged internal battle, with the 81-MP threshold now the focus of rival factions.

Who is Andy Burnham?

Born in Liverpool in 1970, Burnham joined the Labour Party at age 14 after being moved by the BBC drama 'Boys from the Blackstuff'. He studied English at Cambridge, and later served as an MP and government minister before becoming mayor of Greater Manchester in 2017. His mayoral record includes bringing bus services back under public control and high-profile advocacy for the NHS during the pandemic.

“The country needs fundamental changes on the economy, industry, migration and the rebalancing of the north.”

His supporters portray him as the politician who best speaks for regions left behind by London-centric growth.

What happens next

The coming days will show whether Burnham can gather the necessary signatures without delay. Labour's rulebook allows an incumbent leader to be challenged once the threshold is met. While Starmer is resolved to defend his position, the surge of support for Burnham suggests the party may be heading for its most public power struggle since returning to government.