This pages lists all political parties in the United Kingdom.
| Party | UK House of Commons members | Scottish Parliament members | Welsh Parliament members | Northern Ireland Assembly members | Notes |
|---|---|---|---|---|---|
| Conservative Party | 365 | 30 | 11 | 0 | Centre-right party which can be loosely divided into three categories, though with considerable overlap: The Thatcherites, who strongly support a free market and tend to be Eurosceptic, the economically moderate but socially conservative One Nation Conservatives, and the libertarian Conservative Way Forward, which is also relatively Eurosceptic. |
| Labour Party | 200 (inc Lab Co-op) |
23 (inc 9 as Lab Co-op) |
28 (inc 4 as Lab Co-op) |
N/A | Centre-left; historically allied to Trade unions; mixed market (Third Way) policies have replaced its earlier more socialist platform in recent years; supports greater European integration. |
| Liberal Democrats | 11 | 5 | 1 | N/A | Traditionally centrist, had drifted slightly to the left since the emergence of New Labour while remaining socially progressive but now moved towards a tax-cutting agenda; strongly supports greater European integration. Promote social liberalism; opposing what they call the 'nanny state', while supporting the welfare state for the basic necessities of life. |
| Democratic Unionist Party | 8 | N/A | N/A | 27 | More hardline Unionist party in Northern Ireland, has a socially right-wing political agenda, with historical ties to Protestant working classes, thus a centre-left economic history until recently. |
| Scottish National Party | 47 | 61 | N/A | N/A | Centre-left party in favour of Scottish independence. |
| Sinn Féin | 7 | N/A | N/A | 26 | Irish Republican party in Northern Ireland, supports the idea of a full irish republic without any interference from the british house of commons; abstentionist. |
| Plaid Cymru - Party of Wales | 3 | N/A | 10 | N/A | Centre-left party in favour of Welsh independence. |
| Social Democratic and Labour Party | 2 | N/A | N/A | 12 | Constitutional Irish nationalist party in Northern Ireland, has a centre-left and social democratic political orientation. |
| Alliance Party of Northern Ireland | 1 | N/A | N/A | 7 | Liberal party in Northern Ireland that aims to breakdown sectarian divisions between Catholics and Protestants. Has a neutral stance on the Constitutional issue of Northern Ireland's status and is linked with the Liberal Democrats. |
| Green Party of England and Wales | 1 | N/A | 0 | N/A | Generally centre-left, environmentalist party. Favours British republicanism |
| Ulster Unionist Party | 0 | N/A | N/A | 10 | Unionist party in Northern Ireland which is traditionally an amalgam of the political spectrum, considered more moderate than the Democratic Unionist Party. |
| UK Independence Party | 0 | 0 | 0 | 0 | Eurosceptic, conservative and populist party which favours withdrawal from the European Union, small government and economic liberalism. |
| Scottish Green Party | 0 | 5 | N/A | N/A | Environmentalist party in favour of Scottish independence. |
| Progressive Unionist Party | N/A | N/A | N/A | 1 | Loyalist party in Northern Ireland broadly sympathetic to the Labour Party, has links to a loyalist paramilitary, the Ulster Volunteer Force. |
| Green Party in Northern Ireland | 0 | N/A | N/A | 2 | Environmentalist party in Northern Ireland. |