Legislate for a UK-wide referendum on the voting system for House of Commons elections, with two options: Replace First Past the Post with proportional representation using the Single Transferable Vote (STV) system, or keep First Past The Post. Include a potential timetable for implementation.

FPTP is an unfair voting system. It can produce large majorities in the House of Commons from a minority of votes and makes voters' influence depend on where they live. In 2024 the largest party won 63% of seats on 33.7% of votes, while smaller parties won far fewer seats than their vote shares, that meant ~24k votes per Labour MP, ~461k votes per Green MP, and ~824k per Reform MP. PR-STV makes votes count more equally, keeps local representation and reduces the need for tactical voting.