Runcorn & Helsby 2025
Reform UK's first Westminster by-election win - a historic 25-point swing from Labour in a seat held since 1997.
Historic result
Runcorn & Helsby was Labour's to lose. The seat - covering the town of Runcorn on the Mersey estuary and the commuter villages of Helsby and Frodsham in Cheshire - had been Labour-held since 1997. In July 2024 Labour won with a majority of over 14,000 votes. Less than a year later, Reform UK overturned that majority to secure their first ever Westminster by-election victory, winning by 5 percentage points on a swing of over 25 points.
Full Result
| Party | Votes % | Change vs 2024 | Notes |
|---|---|---|---|
| Reform UK | 38% | +21 pts | Won seat; candidate: Sarah Pochin |
| Labour | 33% | -25 pts | Lost seat held since 1997 |
| Conservative | 11% | -12 pts | Vote collapsed; squeezed between Reform and Labour |
| Green | 5% | +2 pts | Small increase as some Labour voters moved left |
| Others | 13% | +14 pts | Includes Lib Dem, TUSC, independents |
Vote Share Comparison: 2024 vs 2025
Swing Analysis
From 17% at the 2024 General Election to 38% at the by-election - an extraordinary 21-point increase in just 10 months. Reform's core support turned out at disproportionately high rates.
Labour's 58% in July 2024 fell to 33% - a loss of 25 percentage points. A combination of disillusionment with the new Labour government and Reform's energised ground campaign drove a massive transfer of votes.
Conservative voters faced a choice: vote Reform (anti-Labour) or stay loyal. Most chose Reform. The Conservative share fell from 23% to just 11%, demonstrating that Reform is now the primary vehicle for right-of-Labour protest votes in northern England.
Why Runcorn Voted Reform
The demographic shift
Runcorn was a classic post-industrial Labour seat - chemical industry heritage, high social housing stock, working-class communities. The town experienced significant deindustrialisation in the 1980s and 1990s, and while Labour retained loyalty through that period, the new generation of voters in 2025 had weaker party ties. Reform's messaging on immigration, cost of living and government competence resonated strongly with voters who felt Labour had failed to deliver on its 2024 promises within its first year in government.
The Helsby factor
The Helsby and Frodsham portion of the constituency - more suburban, more owner-occupied - had traditionally voted Conservative. With the Conservative vote collapsing to 11%, a large portion of those former Tory voters moved directly to Reform rather than Labour, contributing to Reform's winning margin. This two-directional squeeze on Labour from both left-behind northern voters and suburban former Tories is the key pattern to watch in 2029.
National Implications
The Runcorn result sent shockwaves through Westminster. Five key implications:
- Reform can win seats under FPTP. Until Runcorn, sceptics argued that Reform's support was too evenly spread geographically to convert polling into seats. Runcorn proved that in the right conditions - high turnout among Reform supporters, low turnout overall, disillusionment with Labour - the party can win first-past-the-post contests.
- Labour's 2024 majority seats are vulnerable. Labour won Runcorn & Helsby with a 14,000+ majority in 2024. If a 14,000-majority seat can fall in a by-election, seats with majorities of 3,000-8,000 are genuinely at risk at a general election, especially in northern England and the Midlands.
- The Conservative collapse is ongoing. A 12-point fall in an already reduced Conservative vote share demonstrates that the 2024 election did not mark the floor for the party. If Conservatives continue to shed votes to Reform, their ability to form the official opposition becomes questionable.
- Nigel Farage's personal brand drives turnout. Exit polling and canvassing data from Runcorn suggested that Farage's direct involvement in the campaign significantly boosted Reform's vote. The party's dependence on his personal profile remains a structural risk for 2029.
- Labour's first year in government damaged it severely. The timing - less than a year after Labour's landslide - made the swing even more damaging psychologically. Voters who switched to Labour in 2024 switched straight back out again, suggesting the 2024 Labour majority was built on tactical or protest votes that are not durable.