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.
Legislature
In bicameral legislatures, one chamber is usually considered the upper house, while the other is considered the lower house. The two types are not rigidly different, but members of upper houses tend to be indirectly elected or appointed rather than directly elected, tend to be allocated by administrative divisions rather than by population, and tend to have longer terms than members of the lower house. In some systems, particularly parliamentary systems, the upper house has less power and tends to have a more advisory role, but in others, particularly presidential systems, the upper house has equal or even greater power. 
In federations, the upper house typically represents the federation's component states. This is a case with the supranational legislature of the European Union. The upper house may either contain the delegates of state governmentsas in the European Union and in Germany and, before 1913, in the United Statesor be elected according to a formula that grants equal representation to states with smaller populations, as is the case in Australia and the United States since 1913.