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.
List of European Union member states by political system
A further distinction is the number of chambers in the national legislature; unicameral systems with one chamber or bicameral ones with a lower house and an upper house. Federations and countries with strong regional differences or regional identities are normally bicameral, to reflect the regions' interests in national bills. The states with the larger populations, from the Netherlands upwards, all have a bicameral system. Although there is a greater mix among the smaller states (some influenced by their federalist structure), the smallest states are on the whole unicameral.