Principal Officers and staff This section outlines a number of key roles in Parliament. In this section About MPs, Lords & officers Principal Officers and staff Black Rod Clerk of the House of Commons Clerk of the Parliaments (Lords) Commons Deputy Speakers Government and Opposition roles Leader of the House of Commons Leader of the House of Lords Serjeant at Arms The Lord Chancellor The Lord Speaker Whips House of Commons Enquiry Service The House of Commons Enquiry Service answers questions about the work, history and membership of the House. Telephone: 0800 112 4272 (Freephone) or 020 7219 4272Email: hcenquiries@parliament.ukText phone: Dial 18001 followed byour full numberTelephone enquiry service is open between 10am-12 midday and 2pm-4pm (Monday to Friday). Find out more Lords Enquiry Service and FAQs House of Lords FAQs The Lords Enquiry Service provides information on the role, work and membership of the House of Lords. Telephone: 0800 223 0855 (Freephone) or 020 7219 3107 Email: hlinfo@parliament.uk Text Relay: 18001 7219 3107 The telephone enquiry service is open from 10am - 5pm Monday to Thursday, and 10am - 4pm on Fridays. During recess, the hours are 10am - 1pm and 2pm - 4pm Monday to Friday. House of Lords quick links Lords publications Frequently asked questions House of Lords business Lords Journal Lords Hansard Bills before Parliament Lords votes results Select committees Lord Speaker Leader of the House of Lords