What Would Britain Look Like Under Proportional Representation?
By Grace Wilson · 3 minute read · 4 July 2026
At first glance, proportional representation seems like an obvious improvement on Britain’s electoral system. The argument is straightforward. If a party wins 15% of the vote, it should receive roughly 15% of the seats in Parliament. That feels fair. By contrast, the UK’s First Past the Post (FPTP) system often produces results that appear anything but proportional. Under FPTP, the candidate with the most votes in each constituency becomes an MP. The party that wins the most MPs – usually at least 326 seats – forms the government, and its leader becomes Prime Minister. The system is designed less around perfectly reflecting public opinion and more around producing governments that can actually govern.
Proportional representation works differently. Instead of rewarding parties for winning individual constituencies, seats are distributed according to each party’s share of the vote. In theory, Parliament becomes a mirror of the electorate.
Looking at what the 2024 election would look like under PR, the appeal is immediately obvious.
The graph highlights a genuine weakness in the current system. Labour won 411 seats despite receiving little more than a third of the national vote. Reform UK secured millions of votes but only ended up with five MPs. The Greens face a similar problem. Under a proportional system, both parties would gain dozens of additional seats, while Labour’s overwhelming majority would disappear. If the objective of an electoral system is to make Parliament resemble the electorate as closely as possible, PR clearly performs better. The problem is that Parliament does not exist solely to represent public opinion. It also must produce governments. This is important when looking at the projected numbers. Labour remains the largest party under PR, but with 219 seats it falls more than 100 seats short of a majority. No party comes remotely close to governing alone. The election would not really end when the votes were counted, it would move into a phase of negotiations.
Instead of voters deciding who governs, parties would spend days or weeks deciding which combination of agreements could command a majority in the Commons. Labour might renegotiate with the Lib Dems. The Conservatives might attempt to build an alternative coalition. Smaller parties would suddenly find themselves in the position of kingmakers, able to extract concessions in exchange for support. This can be a strength of PR. Compromise, after all, is a central part of democratic politics. Yet compromise is not always the same as accountability. One of the strengths of FPTP is its clarity. If a government performs badly, voters know who to blame. If it succeeds, they know who deserves credit. Elections produce a direct connection between promises and outcomes. Under coalition politics, that connection fades.
Policies emerge from negotiations between several parties, each able to claim credit for successes and shift responsibility for failure.
Britain has already had a glimpse of this. Following the 2010 election, the Conservatives fell short of a majority and entered a coalition with the Lib Dems. The arrangement lasted five years and was largely stable. However, the Lib Dems were forced to compromise on their pledge to oppose any increases to tuition fees. In 2010, the coalition voted to raise tuition fees to £9,000 a year. Consequently, the Lib Dems suffered in the 2015 general election, losing 37 seats. This highlighted a challenge inherent in coalition politics. Parties inevitably have to abandon or dilute parts of their manifesto in order to reach an agreement. Voters cast ballots for one programme and often end up with something quite different.
The question then, is not whether proportional representation is fairer. In many respects, it is. The more difficult question is what elections are actually for. If the primary purpose of an election is to create a Parliament that reflects the full range of political opinion, proportional representation is hard to beat. If the purpose is to produce governments that are clear, accountable and capable of implementing a programme without constant negotiation, the case becomes less convincing. Looking at projected results, Britain under PR would almost certainly be more representative. It would also be more fragmented. Smaller parties would enjoy greater influence, but that influence would be exercised through post-election bargaining and not direct electoral victory. Parliament would better reflect the electorate, yet governments would be harder to form and harder to hold accountable.
The debate over electoral reform is framed as a question of fairness. In reality, it is a question of priorities. The UK’s current system prioritises governability. PR prioritises representation. The challenge is that, in politics, it is often difficult to maximise both at the same time.