List of political parties in the United Kingdom
Parliamentary parties
Two parties dominate politics in the House of Commons. Each one operates throughout Great Britain (only the Conservative and Unionist Party stands candidates in Northern Ireland).

List of political parties in the United Kingdom

Section Title: Parliamentary parties
Table Section Text: Two parties dominate politics in the House of Commons. Each one operates throughout Great Britain (only the Conservative and Unionist Party stands candidates in Northern Ireland).

Party	Date of foundation	Political position	Leader	House of Commons	Scottish Parliament	National Assembly for Wales	Northern Ireland Assembly	London Assembly	European Parliament	Local Government	Membership	UK vote share % (2017 general election)

Conservative and Unionist Party	1834	Centre-right	-	Theresa May	313	31	12	N/A	8	19	9,116	124,000 (Does not publish official membership numbers, data based on 3rd party sources)	42.4

Labour Party •Co-operative Party	1900 •1917 (Co-operative)	Centre-left	-	Jeremy Corbyn	246	23	29	N/A	12	20	6,470	552,000	40.0

Scottish National Party	1934	Centre-left	-	Nicola Sturgeon	35	63	N/A	N/A	N/A	2	430	125,500	3.0

Liberal Democrats	1988	Centre to centre-left	-	Vince Cable	11	5	1	N/A	1	1	1,890	100,500	7.4

Change UK – The Independent Group	2019	Centre	-	Heidi Allen (interim)	11	N/A	N/A	N/A	N/A	2	N/A	N/A	N/A

Democratic Unionist Party	1971	Centre-right to right-wing	-	Arlene Foster	10	N/A	N/A	28	N/A	1	131	Not published	0.9

Sinn Féin	1905 (original); 1970 (current)	Centre-left to left-wing	-	Mary Lou McDonald	7	N/A	N/A	27	N/A	1	103	Not published	0.7

Plaid Cymru	1925	Centre-left to left-wing	-	Adam Price	4	N/A	11	N/A	N/A	1	203	10,500	0.5

Green Party of England and Wales	1990	Left-wing	-	Siân Berry and Jonathan Bartley (job share)	1	N/A	N/A	N/A	2	3	187	41,073	1.6

Scottish Green Party	1990	Centre-left to left-wing	-	Patrick Harvie and Maggie Chapman	N/A	6	N/A	N/A	N/A	N/A	19	7,091 (December 2017)

UK Independence Party	1993	Right-wing to far-right	-	Gerard Batten	N/A	N/A	3	N/A	1	3	108	24,200	1.8

Social Democratic and Labour Party	1970	Centre-left	Colum Eastwood MLA.JPG	Colum Eastwood	N/A	N/A	N/A	12	N/A	N/A	59	Not published	0.3

Ulster Unionist Party	1905	Centre-right	-	Robin Swann	N/A	N/A	N/A	10	N/A	1	84	Not published	0.3

Alliance Party of Northern Ireland	1970	Centre	Cropped image of Naomi Long.JPG	Naomi Long	N/A	N/A	N/A	8	N/A	N/A	30	Not published	0.2

Green Party in Northern Ireland	1983	Centre-left	Clare Bailey	N/A	N/A	N/A	3	N/A	N/A	4	406 (May 2015)

Traditional Unionist Voice	2007	Right-wing	-	Jim Allister	N/A	N/A	N/A	1	N/A	N/A	10	Not published	0.1

People Before Profit	2005	Left-wing to far-left	-	Eamonn McCann	N/A	N/A	N/A	1	N/A	N/A	1	Not published

Brexit Party	2019	Single-issue	-	Nigel Farage	N/A	N/A	N/A	N/A	N/A	14	N/A	Not published	N/A

Social Democratic Party	1990	Centre	William Clouston	N/A	N/A	N/A	N/A	N/A	1	2	Not published	0.0

Sentence(s)

The Labour Party is a centre-left political party in the United Kingdom.

final_sentence: The Labour Party is a centre-left political party in the United Kingdom.