Politics of the United Kingdom
The UK Parliament is the supreme legislative body in the United Kingdom (i.e., there is parliamentary sovereignty), and Government is drawn from and answerable to it. Parliament is bicameral, consisting of the House of Commons and the House of Lords. There is also a devolved Scottish Parliament and devolved Assemblies in Wales and Northern Ireland, with varying degrees of legislative authority.
House of Commons
In the UK and Canada, the Commons holds much more legislative power than the respective upper house of parliament. The leader of the majority party in the House of Commons usually becomes the prime minister. Since 2010 the House of Commons of the United Kingdom has had 650 elected members, and since 2015 the House of Commons of Canada has had 338 members. The Commons' functions are to consider through debate new laws and changes to existing ones, authorise taxes, and provide scrutiny of the policy and expenditure of the Government. It has the power to give a Government a vote of no confidence.