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.
Parliament of the United Kingdom
The legislative authority, the Crown-in-Parliament, has three separate elements: the Monarch, the House of Lords, and the House of Commons. No individual may be a member of both Houses, and members of the House of Lords are legally barred from voting in elections for members of the House of Commons. Formerly, no-one could be a member of Parliament while holding an office of profit under the Crown, thus maintaining the separation of powers, but the principle has been gradually eroded. Until 1919, Members of Parliament who were appointed to ministerial office lost their seats in the House of Commons and had to seek re-election; the rule was abolished in 1926. Holders of officers are ineligible to serve as a member of Parliament under the House of Commons Disqualification Act 1975.