- Passes primary legislation, known as Acts of Parliament, after it has been approved by the House of Commons and the House of Lords and granted Royal Assent.
- Scrutinizes the work of the government through its committees and debates.
Financial functions:
- Approves the annual budget and grants supply to the government.
- Scrutinizes the government's financial spending through its committees and the Public Accounts Committee.
Executive functions:
- Holds the government to account for its actions through Prime Minister's Questions and ministerial questions.
- Approves the appointment of new government ministers.
- Has the power to initiate an inquiry through select committees or parliamentary commissions.
Constituency functions:
- Represents the interests of its constituents, who are the individual citizens who live in the parliamentary constituencies that make up the UK.
Other functions:
- Plays an important role in overseeing the UK's overseas territories, Crown dependencies, and other territories.
- Has the power to amend the UK's unwritten constitution, known as the 'Bagehot convention'.