3.1.2.3 - Party Structure, Funding and the Party System

Functions and organisation

A political party is an organisation that seeks political power by contesting elections, winning offices and shaping government policy. This makes parties different from pressure groups: a pressure group usually tries to influence those in power, while a party normally tries to become the government, join government, or organise parliamentary opposition.

Party functions are the jobs parties perform in a representative democracy. They include:

• representation: turning social interests and values into political claims
• interest aggregation: combining many demands into a broad programme
• policy formation: producing manifestos and campaign pledges
• political recruitment: selecting candidates and developing leaders
• voter mobilisation: campaigning, canvassing and persuading voters to participate
• government and opposition: supplying ministers, backbenchers and an alternative government
• political education: giving voters labels, arguments and cues about public issues
• agenda-setting: pushing issues onto the political agenda

Party structure means the formal and informal organisation through which these functions are carried out. In the UK, major parties are not just parliamentary teams. They include central headquarters, parliamentary parties, local branches, members, donors, affiliated bodies and professional campaign staff.

The key analytical point is that structure affects power. A highly centralised structure can produce disciplined national messaging and quick decisions, but it may weaken local or member influence. A more decentralised structure can produce stronger internal democracy, but may make party discipline and rapid campaign coordination harder.

Internal democracy and membership

It is not the same thing as national democracy. A party can campaign for democracy in the country while still being quite centralised internally.

Membership matters because members can supply money, activists, legitimacy and a leadership selectorate. Yet party members are only a small slice of the electorate, so giving them power can raise a democratic tension: are parties empowering citizens, or allowing a small and sometimes unrepresentative group to choose leaders and shape policy?

The three AQA focus parties show different balances of member power and elite control:

These arrangements are more democratic than the older model in which leaders could emerge from parliamentary elites with little direct membership vote. But they are still not pure internal democracy. MPs, party boards, NECs, conference procedures and eligibility rules decide who gets on the ballot and which issues members can actually determine.

For AQA evaluation, avoid saying "members have power" or "leaders control everything" as if either is always true. A stronger answer weighs different kinds of power: members may vote in leadership elections, but leaders and central bodies often control strategy, discipline, media presentation, parliamentary management and the timing of reforms.

Funding and regulation

Party funding means the money and resources parties use to organise, campaign, employ staff, communicate with voters and develop policy. Political finance matters because parties cannot perform democratic functions without money, but unequal or opaque funding can create concerns about influence, access and fairness.

UK parties draw on several sources:

• membership subscriptions and small donations
• large individual donations
• company donations from permissible sources
• trade union affiliation fees and donations, especially important to Labour historically
• fundraising events and conferences
• commercial income, legacies and loans
• public funds, such as opposition funding in Parliament and Electoral Commission policy development grants

The key modern law is the Political Parties, Elections and Referendums Act 2000, usually called PPERA. The Electoral Commission regulates political finance by registering parties, publishing donation and loan data, requiring annual accounts and taking enforcement action where rules are broken.

Important rules:

• For regulated donations over GBP500 and regulated loans, parties must check that the source is permissible. Donations of GBP500 or less are outside these donation controls.
• In Great Britain, permissible sources include individuals on a UK electoral register, most UK-registered companies carrying on business in the UK, UK-registered trade unions, political parties, building societies, LLPs, friendly societies and UK-based unincorporated associations.
• There is no general cap on how much a permissible source can give.
• Central parties report a first calendar-year donation/loan or aggregate from one source above GBP11,180. After that threshold is crossed, further unreported benefits from the same source are reported when they aggregate above GBP2,230 in the rest of that year. Accounting units report above GBP2,230.
• Regulated impermissible or unidentifiable donations must be returned within 30 days.
• Parties with income or expenditure over GBP250,000 must submit independently audited annual accounts.

Recent evidence shows the scale of party finance. In Q1 2026, UK registered parties reported accepting GBP24.716m in donations and public funds. Reform UK reported GBP9.936m, the Conservatives GBP6.063m, Labour GBP4.103m and the Liberal Democrats GBP3.018m. For 2024 annual accounts, Labour's own audited accounts recorded income of GBP90.748m and expenditure of GBP94.509m. The Electoral Commission's 2024 publication recorded Conservative income of GBP50.174m, Liberal Democrat income of GBP12.580m, Reform UK income of GBP10.833m and Green Party income of GBP5.218m.