Reform UK has experienced a dramatic surge in paid membership during 2024 and 2025, with figures suggesting the party has not only overtaken the Conservative Party but potentially surpassed Labour to become Britain’s largest political party by member count.
The party’s growth accelerated following its electoral breakthrough in 2024, when it secured five parliamentary seats and attracted high-profile defections from established parties. These developments have fundamentally altered the landscape of British party politics.
Current data indicates Reform UK reached 250,000 paid-up members by September 2026, compared to the Conservative Party’s 123,000 members during the same period.
How Many Members Does Reform UK Have?
250,000 (Sept 2026)
123,000 members
309,000 members
Largest party (Dec 2025)
- Reform UK announced 250,000 paid-up members by September 2026
- The Conservative Party’s membership declined to 123,000 in the same period
- Labour maintained 309,000 members as of September 2026
- The Times reported Reform as Britain’s largest party by December 2025
- High-profile Conservative defections accelerated growth in late 2024
- Reform invited major media outlets to inspect membership data
- Conservative leader Kemi Badenoch disputed Reform’s figures as fabricated
| Party | Membership | Date | Source Type |
|---|---|---|---|
| Reform UK | 250,000 | September 2026 | Party announcement |
| Conservative | 123,000 | September 2026 | Party figures |
| Labour | 309,000 | September 2026 | Party figures |
| Reform UK | Second-largest claim | December 2024 | Party announcement |
| Reform UK | Largest party claim | December 2025 | The Times report |
Has Reform UK Surpassed Conservative Party Membership?
Reform UK’s membership figures now significantly exceed those of the Conservative Party. With 250,000 members against the Conservatives’ 123,000 as of September 2026, Reform has established a numerical advantage of more than two to one.
The Conservative Decline
The Conservative Party’s membership has fallen to 123,000, representing a significant contraction from previous years. This decline coincided with Reform’s parliamentary breakthrough and subsequent electoral gains.
Claims of Supremacy
By December 2025, Reform UK had advanced claims of becoming Britain’s largest political party, surpassing not only the Conservatives but also overtaking Labour’s membership numbers according to reports.
Reform UK’s claimed membership of 250,000 represents more than double the Conservative Party’s 123,000 members, though still short of Labour’s 309,000 members as of September 2026. However, The Times reported that Reform had overtaken Labour by December 2025.
When Did Reform UK Membership Surge?
Reform UK’s membership growth followed a distinct trajectory tied to electoral milestones and political defections throughout 2024 and 2025.
The 2024 Electoral Breakthrough
The party won five seats in the 2024 general election, marking its first time electing MPs to Westminster. This success followed Lee Anderson’s defection from the Conservatives in March 2024, which gave Reform its first sitting MP.
Late 2024 Defections
November and December 2024 witnessed accelerated growth as several high-profile Conservative figures defected. Former MPs Andrea Jenkyns and Lucy Allan joined the party, alongside public figures including Holly Valance and billionaire property developer Nick Candy.
The Path to 250,000
On 26 December 2024, Reform UK asserted it had become the UK’s second-largest party behind Labour. By December 2025, reports indicated the party had grown into Britain’s largest political party by membership.
Is Reform UK Membership Verified?
The accuracy of Reform UK’s membership claims has generated significant political controversy, prompting offers of verification and public disputes.
Media Inspection Offers
In response to accusations of fabrication, Reform UK invited the Financial Times, Sky News, The Spectator, and The Daily Telegraph to inspect their website’s front and back-end code and underlying membership data. This invitation aimed to demonstrate the technical infrastructure supporting their claimed figures.
While Reform UK offered access to website code and data to selected media outlets, independent audits by the Electoral Commission or other neutral bodies have not publicly confirmed the 250,000 figure. Conservative leader Kemi Badenoch maintains the numbers are fabricated.
Political Disputes
Conservative Party leader Kemi Badenoch publicly disputed Reform’s membership totals, claiming the figures were fabricated. This accusation triggered Reform’s invitation to media organisations to verify the underlying data.
Reform UK extended verification invitations to specific publications including the Financial Times, Sky News, The Spectator, and The Daily Telegraph, allowing access to both front-end displays and back-end membership databases.
What Is the Timeline of Reform UK Membership Growth?
- : Lee Anderson defects from Conservatives to become Reform’s first MP. Source: Party records
- : Reform UK wins five seats in the general election. Source: Official election results
- : Andrea Jenkyns and Lucy Allan defect from Conservatives. Source: Party announcements
- : Holly Valance and Nick Candy join Reform UK. Source: Party announcements
- : Reform claims second-largest party status behind Labour. Source: Party statement
- : The Times reports Reform as Britain’s largest party by membership. Source: The Times
- : Reform announces 250,000 paid-up members. Source: Party announcement
What Is Certain About Reform UK Membership Claims?
| Established Information | Unclear Information |
|---|---|
| Reform UK claims 250,000 members as of September 2026 | Independent audit confirmation of the 250,000 figure |
| Conservative membership at 123,000 (Sept 2026) | Exact monthly growth rates between milestones |
| Labour membership at 309,000 (Sept 2026) | Regional distribution of Reform members |
| Reform invited specific media to verify data | Member retention rates versus new acquisitions |
| Badenoch publicly disputed the figures | Financial sustainability of membership operations |
What Context Explains Reform UK’s Membership Growth?
Reform UK’s membership expansion occurred within a specific political context marked by Conservative fragmentation and shifting political allegiances. The party’s first MP, Lee Anderson, established a parliamentary presence that preceded the 2024 general election breakthrough.
The defection pattern intensified during late 2024, with former Conservative MPs Andrea Jenkyns and Lucy Allan bringing parliamentary experience to the party. Celebrity endorsements from Holly Valance and financial backing from Nick Candy provided additional visibility and resources. The party’s claim of 250,000 paid-up members by September 2026 is a significant milestone, and you can explore the details of Reform Party membership numbers.
This growth trajectory reflects broader trends in British party politics, where traditional loyalties have become increasingly fluid. The party’s ability to attract both working-class voters and wealthy donors has created a diverse membership base that challenges conventional political categorizations.
What Do Sources Say About Reform UK Membership?
“Reform UK had grown into the largest political party in Britain and overtaken Labour by membership numbers.”
— The Times, December 2025
“Reform’s totals were fabricated.”
— Kemi Badenoch, Conservative Party Leader
“Reform UK invited Financial Times, Sky News, The Spectator, and The Daily Telegraph to inspect their website’s front and back-end code and underlying membership data.”
— Reform UK Verification Statement
What Do Reform UK Membership Numbers Mean for UK Politics?
Reform UK’s claimed membership figures, whether fully verified or not, represent a significant shift in British party dynamics. The numerical superiority over the Conservative Party, combined with parliamentary representation, positions Reform as a permanent feature of the political landscape rather than a temporary protest movement.
Frequently Asked Questions
Which MPs defected to Reform UK in 2024?
Lee Anderson defected in March 2024 to become Reform’s first MP. Former Conservative MPs Andrea Jenkyns and Lucy Allan joined in November and December 2024.
How many parliamentary seats did Reform UK win in 2024?
Reform UK won five seats in the 2024 general election, marking the first time the party elected MPs to Westminster.
What media outlets did Reform UK invite to verify membership data?
Reform invited the Financial Times, Sky News, The Spectator, and The Daily Telegraph to inspect website code and underlying membership databases.
When did Reform UK claim to become the second-largest party?
On 26 December 2024, Reform UK asserted it had become the UK’s second-largest party behind Labour in terms of membership size.
Who disputed Reform UK’s membership figures?
Conservative Party leader Kemi Badenoch publicly claimed Reform’s membership totals were fabricated, prompting the verification invitations to media outlets.
How does Reform UK’s membership compare to Labour’s?
As of September 2026, Reform claimed 250,000 members compared to Labour’s 309,000, though The Times reported Reform had overtaken Labour by December 2025.
Sophie Kendall is Tools & Digital Culture Correspondent at WordPatch.co.uk, covering writing tools, productivity software, AI writing platforms, digital publishing and online communication trends.