Potential re-accession of the United Kingdom to the European Union - WikipediaA Wikipedia article surveys the possibility of the United Kingdom rejoining the European Union after its 2020 departure: polling since Brexit shows support for rejoining overtaking opposition from 2021, with 2026 polls averaging over half in favour, while a September 2023 Franco-German proposal floated associate membership including the single market but not the customs union. Party positions vary — Keir Starmer ruled out rejoining in 2023, Prime Minister Andy Burnham has hinted at it without full Labour backing, the Liberal Democrats and Greens support closer ties, and Reform and the Conservatives want to stay out — and rejoining would require unanimous support from EU member states under Article 49 of the Maastricht Treaty.