The Lord Great Chamberlain is the hereditary Officer of State to whom the Sovereign entrusts the custody and control of those parts of the Palace of Westminster not assigned to the two Houses, principally, the Queen's Robing Room and the Royal Gallery. When the Sovereign opens Parliament the Lord Great Chamberlain is responsible for the arrangements. The Lord Great Chamberlain also has control jointly with the Speakers of the two Houses over Westminster Hall and the Crypt Chapel.
The Lord Great Chamberlain sometimes participates in introductions and is responsible for administrative arrangements when the Sovereign is present. Under the House of Lords Act and Standing Orders the Lord Great Chamberlain remains a member of the House despite being an hereditary Peer.