The two Houses of the Parliament of the United Kingdom (the House of Lords and the House of Commons) are based at The Palace of Westminster, also known as the Houses of Parliament, in London.
The Palace of Westminster (Houses of Parliament) where the UK Government sits
The palace lies on the north bank of the River Thames in the London borough of the City of Westminster, close to the government buildings of Whitehall.
Parliament decides the laws and make decisions on running the UK. (Some issues in Scotland,Wales and Northern Ireland are now dealt with by their respective parliaments and assemblies.) There has been a parliament at Westminster since the 13th Century.
The UK government is normally formed by the leader of the party that wins the most seats in the general election. All actions by the government - and particularly its proposals to amend or create laws - are scrutinised within parliament.