Political parties and leaders: Alliance Party (Northern Ireland) [Naomi LONG]
Brexit Party [Nigel FARAGE]
Conservative and Unionist Party [Boris JOHNSON]
Democratic Unionist Party or DUP (Northern Ireland) (vacant)
Green Party of England and Wales or Greens [Sian BERRY and Jonathan BARTLEY]
Labor (Labour) Party [Sir Keir STARMER]
Liberal Democrats (Lib Dems) [Ed Davey]
Party of Wales (Plaid Cymru) [Adam PRICE]
Scottish National Party or SNP [Nicola STURGEON]
Sinn Fein (Northern Ireland) [Mary Lou MCDONALD]
Social Democratic and Labor Party or SDLP (Northern Ireland) [Colum EASTWOOD]
Ulster Unionist Party or UUP (Northern Ireland) [Robin SWANN]
UK Independence Party or UKIP [Pat MOUNTAIN, interim leader]
Definition: This entry includes a listing of significant political parties, coalitions, and electoral lists as of each country's last legislative election, unless otherwise noted.
Source: CIA World Factbook - This page was last updated on Saturday, September 18, 2021