The UK's New Multi-Party Politics Explained

TL;DR

The UK's first-past-the-post system is producing wildly disproportionate results as five parties now compete, making a case for proportional representation.

Key Points

• 1.The UK's two-party vote share has collapsed from 90% to under 60%. Since the 1950s, Labour and Conservatives have lost dominance; the 2024 election saw Labour win 411 seats on just 34% of the vote, while Reform won 14% but received only 5 seats.
• 2.First-past-the-post is producing extreme distortions in local elections. In Wigan, Reform won 46% of the vote but 96% of council seats; in Richmond upon Thames, Lib Dems won 51% of the vote but every single seat, leaving half of voters unrepresented.
• 3.Professor Sir John Curtice predicts unprecedented five-party fragmentation at the next general election, with all parties bunched between 16–26% of the vote, a scenario first-past-the-post cannot fairly accommodate as average candidates per seat surged from 3.45 in 2022 to 4.95.
• 4.Public and cross-party support for proportional representation has hit record highs. After the 2024 election, 60% of the public backed electoral reform — including majorities from every party — and over 50 academics signed an open letter warning of random, arbitrary national election results.
• 5.Significant Labour support makes PR reform more viable than ever. The all-party parliamentary group for fair elections has 159 members, 90 Labour MPs and peers; 66% of Labour members back PR, as do Deputy Leader Lucy Powell and Andy Burnham, with a potential amendment to the Representation of the People Bill in June.