House of Lords

N. The second chamber in the UK's Parliamentary system - also known as the upper house. Formerly, the Lords made laws, checked up on government, provided independent expert advice and carried out some judicial work. The judicial function of Parliament ended in 2009, when an independent UK Supreme Court was established.

http://www.parliament.uk/about/how/members/lords.cfm

The House of Commons, the House of Lords and the Queen all make up Parliament.