Vorlage:Navigationsleiste Parteien im Vereinigten Königreich

House of Commons:	Conservative Party • Labour Party (inkl. Labour and Co-operative Party*) • Scottish National Party • Liberal Democrats • Democratic Unionist Party • Sinn Féin† • Plaid Cymru • Social Democratic and Labour Party • Alba Party • Alliance Party of Northern Ireland • Green Party of England and Wales • Reform UK • Workers Party of Britain
House of Lords:	Conservative Party • Labour Party • Liberal Democrats • Democratic Unionist Party • Ulster Unionist Party • Green Party of England and Wales • Plaid Cymru
Schottisches Parlament:	Scottish National Party • Scottish Conservative Party • Scottish Labour Party • Scottish Green Party • Scottish Liberal Democrats • Alba Party
Walisisches Parlament:	Welsh Labour Party • Welsh Conservative Party • Plaid Cymru • Welsh Liberal Democrats
Northern Ireland Assembly:	Sinn Féin • Democratic Unionist Party • Alliance Party of Northern Ireland • Ulster Unionist Party • Social Democratic and Labour Party • Traditional Unionist Voice • People Before Profit
London Assembly:	London Labour Party • London Conservatives • London Green Party • London Liberal Democrats • Reform UK

*Mitglieder der Labour and Co-operative Party treten gemeinsam mit der Labour Party bei Wahlen an
†Die Abgeordneten von Sinn Féin nehmen ihre Plätze in Westminster nicht ein