Greens ride high after historic Gorton and Denton by-election win

The Green Party is enjoying a surge in confidence after its historic by-election victory in Gorton and Denton, a result that pushed Labour into a humiliating third place and underscored the growing fragmentation of British politics. The win, the Greens' first in a Westminster by-election in the north of England, continues to reverberate through Labour's ranks.

Hannah Spencer, a local plumber and Green councillor, was elected with 40.7 per cent of the vote and a majority of 4,402, becoming the party's first MP in northern England. Reform UK finished second on 28.7 per cent, while Labour, defending the seat, trailed in third on 25.4 per cent.

Commentators described the outcome as seismic. It marked the first time Labour had come third in a by-election it was defending since Mitcham and Morden in 1982, on the back of a swing of 26.4 per cent from Labour to the Greens.

A breakthrough beyond the cities

The result challenged the assumption that the Greens' appeal is confined to affluent university towns and inner-city seats. By winning in a former Labour stronghold in Greater Manchester, the party demonstrated that disillusioned Labour voters were willing to look elsewhere, and that the Greens could compete in industrial and suburban areas.

For Reform UK, the second place was a mixed result, confirming its strength as a challenger but falling short of the breakthrough some had predicted. The contest highlighted a three-way scramble for voters disenchanted with the government, with no single opposition party able to claim a monopoly on protest.

“People here have sent a message that they want something different. This is a moment for our movement and for everyone who has been let down.”

A blow to Labour's strategy

The defeat was widely seen as a nightmare scenario for the government, feeding the sense of crisis that has since engulfed the prime minister. Coming on top of a run of poor election results, it convinced many Labour MPs that the party's electoral coalition was breaking apart and that radical change was needed to win back disaffected supporters.

Senior figures within Labour have drawn sharply different lessons from the result. Some argue the party must move left to counter the Greens, while others insist the threat from Reform UK on its right flank is the greater danger. That unresolved argument now sits at the heart of the leadership turmoil.

Analysts cautioned against reading too much into a single by-election, noting that turnout in such contests is typically low and that protest votes do not always translate into general election outcomes. Even so, the symbolism of Labour finishing third in a seat it had long held proved impossible for the party's critics to ignore, and it sharpened questions about the leadership's strategy.

• Hannah Spencer won with 40.7 per cent of the vote and a 4,402 majority.
• Reform UK finished second on 28.7 per cent; Labour third on 25.4 per cent.
• The swing from Labour to the Greens was 26.4 per cent.
• It was Labour's first third-place finish defending a by-election since 1982.
• It is the Green Party's first Westminster MP elected in northern England.

Background

The Greens have steadily built up their local government base over the past decade and increased their parliamentary representation at the 2024 general election. Gorton and Denton represents a step change, demonstrating that the party can win, rather than merely contest, seats once considered safe for Labour.

The result forms part of a broader pattern in which the dominance of the two main parties has been eroded by Reform UK, the Greens and a resurgent Liberal Democrat presence in parts of the country. Pollsters say the splintering of the vote makes outcomes increasingly unpredictable.

What happens next

With another high-stakes by-election in Makerfield taking place this week, the Greens will be hoping to prove that Gorton and Denton was the start of a trend rather than a one-off. For Labour, the priority is to stem the loss of voters in every direction at once, a task made harder by the open warfare over the party's leadership and direction.