Chamber - Project Open Gov

A formal debating space in Parliament, such as the House of Commons chamber or the House of Lords chamber.

Category: Parliament and elections Parliamentary procedure

Also used as: chambers, parliamentary chamber, Commons chamber, Lords chamber

Source / explainer: Read UK Parliament information on debates

Last reviewed: 21 August 2026

A chamber is a formal space where members of a House of Parliament meet to debate, question ministers, consider legislation and conduct business. In UK Parliament material, the term often refers to the House of Commons chamber or the House of Lords chamber. Because the word is common, it is best used as a glossary page and tooltip rather than being auto-linked heavily.

Related terms

House of CommonsThe elected chamber of the UK Parliament, made up of Members of Parliament.House of LordsThe unelected second chamber of the UK Parliament, which scrutinises bills and government policy.Main ChamberThe principal debating chamber of either House of Parliament.Westminster Hall DebateA Commons debate held away from the main chamber, usually on a general motion without a vote.