One of the reasons people become members of political parties is because of the benefits that membership offers. Yet Stephanie Luke’s analysis of 376 registered political parties in the UK reveals that parties represented in Parliament (Westminster or Devolved) are significantly more likely than unrepresented parties to make membership rights available prior to joining
Despite the general declining trend in membership of political parties, party members remain important. Indeed, they provide a stable pool of voters, financial resources and manpower. Yet without a publicly available constitution, prospective members are unable to make an informed decision about which party to join. Most major political parties publish their membership rights. My research, however, found that practice varied considerably – not just in terms of publication but also in location and content.
When parties apply to stand for election, The Political Parties, Elections and Referendum Act 2000 requires they submit their constitution. The constitution outlines the rules governing party membership, candidate selection, party structure, and how it makes decisions. It sets out the contractual relationship between a person and the political party. If membership rights are not available to view prior to membership, the party (as an unincorporated association) cannot enforce those specific terms against the members.
If a person is looking to join a party based on what membership provides, it is difficult for them to judge which party would benefit them more unless those rights are accessible
Beyond legal requirements, if people join political parties based on what membership provides, without those rights being accessible, it is difficult for them to judge which party would benefit them more. Yet publication of a party’s constitution remains voluntary. Scholarly attention has thus focused on what the rights are, and how easy it is to join a party rather than how available membership rights are to the public.
Party websites are an important tool for parties to encourage prospective members to join the party. As of March 2026, 376 parties had registered on the Electoral Commission’s Great Britain register of political parties. Only 208 (55.5%) of them, however, had functioning websites. To determine the availability and accessibility of membership rights, my research established whether they were available on the party websites, where they were located, and whether those rights were detailed.
Of the 208 parties with a website, only 89 registered parties (42.7%) provided membership rights prior to joining. Of those 89, 63 (70.8%) provided membership rights in a constitution, with 26 (29.2%) outlining rights within a statement.
My research found that parties which fielded candidates only in Scotland (72.7%) and Great Britain-wide parties (52.4%) were significantly more likely to make membership rights available prior to joining than parties which only fielded candidates in England (30.4%). Parties represented in Parliament (Westminster and Devolved) are also significantly more likely than unrepresented parties to make their membership rights available prior to joining.
Membership rights vary substantially across political parties; for instance, in terms of the degree to which members can take part in decision-making
However, membership rights that were available as statements were quite vague. Rights included ‘invitations to conferences and political events’ and ‘voting rights to select candidates’. None of these outlined (for example) the candidate-selection procedures or whether conference was the supreme body for deciding policy agenda. There was, moreover, no standardisation of the location of membership rights. Only 39 (43.8%) of the 89 parties placed rights on the join page/membership form.
Membership rights vary substantially across political parties; for instance, in terms of the degree to which members can take part in decision-making. Given this, the current practice to leave publication of the constitution up to individual parties results in varied practice. Most notably, Reform UK published their constitution in September 2024. But when the party updated its website in January 2026, the constitution was no longer available.
It is a common requirement to submit a constitution in order to register a political party. But some countries, including Austria, go further by mandating that these documents are made available to the public. My findings suggest a need to promote greater consistency in terms of the availability of membership rights across political parties.
On the whole, parties that sit in Westminster or the Parliaments of the devolved administrations do indeed publish their constitutions. But for parties outside this environment, this is not generally the case. Producing and updating a website is expensive and time-consuming. A party with small monetary and personnel resources may therefore choose not to have one, preferring social media accounts instead. But social media doesn't lend itself to displaying long-form text such as a constitution, and it would not support a formal join page.
The British Electoral Commission should include party constitutions on its register of political parties, enabling prospective members to locate the rights associated with membership
For those smaller parties, it may thus be beneficial for the Electoral Commission to include a party’s constitution on the register of political parties. This would also standardise the location of a party’s constitution, enabling prospective members to locate the rights associated with membership. Doing so would also save Electoral Commission time because the public would no longer need to submit freedom of information requests.
Making party constitutions that include membership rights available to the public would result in greater transparency, and ensure consistency across parties.
