Standalone/Tory regime

Name		Founded	Ideology	Leader	Seats
	Conservative Party	1834	Conservatism (British) Thatcherism Euroscepticism	Liz Truss (Prime Minister)	355 / 650
		A broad church right-wing party under control of the Thatcherite faction that supports economic neoliberalism and social conservatism. The party has been in power since 2010 and the new right Thatcherite wing took control in 2022 with the election of Liz Truss. It is the dominant and governing party of the United Kingdom and leads the Bloc of Strength and Stability.
	Liberal Unionist Party	1886 (originally) 2022 (current)	One-nation conservatism Conservative liberalism	Jeremy Hunt (Deputy Prime Minister)	178 / 650
		A centre-right party that supports one-nation conservatism and economic and political pragmatism. It split from the Conservative Party during the 2022-2023 government crisis over a percieved right-ward shift and sought a return to the Conservatives of the early 2010s. It formed the Bloc of Strength and Stability with the remaining Conservatives following the crisis and is the most senior junior party within the coalition government.
	Liberal Democrats	1988	Classical liberalism Pro-Europeanism	Chris Huhne (Lord President of the Council)	51 / 650
		A centrist party that supports classical liberalism, constitutional reform and rejoining the European Union. The party partook in the 2010-2015 coalition government with the Conservative Party and by the early 2020s, classical liberals displaced the progressive wing as the dominant faction. It re-entered into coalition with the Conservatives in 2023 and has low-level roles in national government alongside significant local government control.
	Reform UK	2019 (as the Brexit Party)	Right-wing populism Euroscepticism	Richard Tice (Home Secretary))	4 / 650
		A right-wing party that supports British nationalism and social conservatism and is widely considered to be part of the populist radical right. It formed in 2018 as the Brexit Party, formerly led by ex-UKIP leader Nigel Farage, and became the right-wing alternative to the Conservative Party. It was invited to the bloc in 2024 and holds some senior government posts.
	Social Democratic Party	1981 (original) 1988 (continuing SDP) 1990 (current)	Social conservatism Social democracy Communitarianism British patriotism	William Clouston (Minister of State for Efficiency)	1 / 650
		A syncretic party that combines centre-left social democratic economics with centre-right socially conservative values. It is a descendant of the 1980s Labour Party splinter group of the same name which opposed the power of trade unions and socialists and sought to move the party to the centre. It joined the bloc in 2024 and has some influence over government policy which it uses to support economically left-wing positions.
Regional and local parties
	Unionist Party	1912 (originally) 2022 (current)	Conservatism British unionism Scottish regionalism	Douglas Ross (First Minister of Scotland)	44 / 650
		A centre-right party that supports conservatism and keeping Scotland within the United Kingdom. It first existed in 1912, merged into the nationwide Conservative Party in 1965 and re-established itself during the 2022-2023 government crisis as the Conservative Party split. It is part of the Bloc of Strength and Stability, has electoral pacts with the Conservatives and Liberal Unionists and runs the Government of Scotland.
	Ulster Unionist Party	1905	British unionism Conservatism	Doug Beattie (First Minister of Northern Ireland)	9 / 650
		A centre-right party in Northern Ireland that supports British unionism and conservatism. It was considered a de facto part of the Conservative Party until 1972 and has been the largest unionist party in Northern Ireland since 2025 and was also such prior to 2003. It is part of the Bloc of Strength and Prosperity and also heads the Northern Ireland Executive as the largest party.
	Democratic Unionist Party	1971	British unionism National conservatism Ulster loyalism Right-wing populism	Edwin Poots (Minister for Communities)	9 / 650
		A right-wing party in Northern Ireland that supports British unionism and national conservatism and is considered right-wing populist. It had unofficial links to loyalist paramilitary groups during The Troubles and took over the more moderate Ulster Unionist Party as the largest unionist party by 2003 before falling behind in 2025. It is part of the Bloc for Strength and Stability and is part of the Northern Ireland Executive.