Green Party wins Gorton and Denton by-election as Labour slumps to third

The Green Party has won its first ever parliamentary by-election, taking the Greater Manchester seat of Gorton and Denton with a 40.7% share of the vote and pushing Labour into third place for the first time in the constituency's history. Hannah Spencer, a 34-year-old plumber and plasterer, secured 14,980 votes on a turnout that election officials have not yet confirmed, overturning a Labour majority of more than 13,000 from the general election just seven months ago.

Labour's vote collapses in its former heartland

At the July 2024 general election, Labour took Gorton and Denton with 51% of the vote. On Friday that share fell to 25.4%, a drop of 25.6 percentage points. The party's candidate, whose name has not been widely reported in the immediate aftermath, collected 9,364 votes, fewer than both the Green winner and the Reform UK runner-up. The seat, created for the 2024 election from the former Manchester Gorton constituency, had been held by Labour continuously since 1967. Its loss marks the first time since the second world war that a governing party has fallen to third in a mainland British by-election.

The scale of the swing, roughly 26 points from Labour to the Greens, and a further 15 points from Labour to Reform, suggests a fragmentation of the electoral coalition that delivered Sir Keir Starmer a 174-seat majority last summer. In his first public reaction, the Prime Minister called the result "very disappointing" and said he understood that voters were "frustrated" and "impatient for change." He did not take questions on whether he would reshuffle his team or adjust policy in response.

A breakthrough for the Greens

Spencer's victory makes her the fifth Green member of the House of Commons, joining the four MPs elected in July, Carla Denyer in Bristol Central, Adrian Ramsay in Waveney Valley, Ellie Chowns in North Herefordshire and Siân Berry in Brighton Pavilion. Until Friday the party had never won a by-election at Westminster, despite several strong second places in recent years. Her professional background as a tradeswoman featured heavily in the campaign literature, and her victory speech struck a tone that resonated beyond the usual environmentalist base.

"Instead of working for a nice life, we're working to line the pockets of billionaires. We are being bled dry and I don't think it is extreme or radical to think working hard should get you a nice life," she told supporters in the early hours of Friday morning. The line was replayed across broadcast bulletins and may become the defining soundbite of a campaign that framed the cost of living as a class issue rather than a purely green one.

Reform UK consolidates its position as the main right-wing challenger

Reform UK's 28.7% share, 10,578 votes, represents the party's best by-election performance since it rebranded from the Brexit Party in 2021. The candidate, a local councillor named only as "Mr. Smith" in early agency copy, ran on a platform of net-zero scepticism, immigration control and opposition to what the party calls "two-tier policing." The result confirms Reform's ability to attract former Conservative voters in northern England, a demographic that once formed the backbone of the "Red Wall" seats Labour recaptured in 2024.

The Conservative Party, which finished fourth with a derisory share, has now lost its deposit in three consecutive by-elections. Its vote in Gorton and Denton was not immediately published but is understood to be below 5%. The party's national leadership has not commented, though several backbenchers have privately told journalists they expect a formal review of the northern strategy before the May local elections.

What the polling experts say

John Curtice, professor of politics at the University of Strathclyde and the UK's most cited psephologist, told broadcasters on Friday that the result illustrates a structural break in British electoral politics. "We are getting an unprecedented challenge by Reform, as it were from the right, stroke the more socially conservative end of Britain, challenging the Conservative party. And now, the Greens apparently now serious competitors with Labour for voters on the left and those of a more social liberal disposition," he said. "Historically, in Britain, we've said elections are won and lost on the centre ground. That's not what is happening at the moment."

Damian Lyons Lowe, chief executive of the polling company Survation, was blunter about the Green Party's prospects. "The Green Party will be absolutely cock-a-hoop," he said. "I think people looking forward now to the local elections, certainly this is a really, kind of, energy boost for the Green Party because the wasted vote argument that is normally the curse of the Green Party, that a vote for the Greens is just letting Reform in, for example, or the Tories in, those voters will feel energized and I think the Greens will do better than they would have done otherwise in the local elections in May."

Starmer's accumulating pressures

The by-election defeat arrives at the end of a week in which the Prime Minister's authority was already being questioned in Westminster. The appointment of Peter Mandelson as ambassador to Washington, a figure associated with the New Labour era and, more controversially, with the late financier Jeffrey Epstein, drew criticism from across the political spectrum and from within Labour's own ranks. At the same time, a string of departures from Downing Street, including the director of communications and the chief of staff's deputy, has fuelled speculation about internal dysfunction.

None of these factors appeared directly on the doorstep in Gorton and Denton, where voters cited housing repairs, NHS waiting lists and the cost of energy as their primary concerns. But the cumulative effect is a perception of a government that has lost its early momentum. Labour's private polling, leaked to two Sunday newspapers last weekend, showed the party's national lead over the Conservatives narrowing to single digits for the first time since the election.

Market reaction muted but notable

Financial markets barely moved on the news. The yield on the 10-year UK government bond, or gilt, stood at 4.267% on Friday morning, marginally lower than Thursday's close and erasing a small early gain. The 30-year yield was last seen at 5.069%. Traders said the by-election was not a macroeconomic event, but the gilt market's calmness may reflect a judgement that neither a Green MP nor a stronger Reform presence in local government will alter the fiscal trajectory set by Chancellor Rachel Reeves's October budget.

Implications for the May local elections

The next electoral test comes on 7 May, when voters in England will elect councillors in 23 county councils, six unitary authorities and several mayoral contests including the West Midlands and Greater Manchester. The Green Party currently holds fewer than 800 council seats nationwide; a surge in May could see it become the third-largest party in local government, overtaking the Liberal Democrats in some regions. Reform UK, which has almost no councillors at present, is fielding candidates in almost every ward for the first time.

Labour's challenge is to prevent a narrative of collapse from taking hold. The party's national campaign coordinator, Pat McFadden, has already announced a "listening exercise" in key battleground councils, though insiders say the strategy remains focused on delivery of the government's five missions, growth, NHS reform, clean energy, crime reduction and opportunity, rather than tactical repositioning.