Prime Minister of the United Kingdom the convention developed that the Prime Minister should always sit in the lower house. As leader of the House of Commons, the Prime Minister's authority was further enhanced by the Parliament Act of 1911 which marginalised the influence of the House of Lords in the law-making process. The Prime Minister is "ex officio" also First Lord of the Treasury and Minister for the Civil Service. Certain privileges, such as residency of 10 Downing Street, are accorded to Prime Ministers by virtue of their position as First Lord of the Treasury. The status of the position as Prime Minister means that
Additional Civil Lord of the Admiralty Elswick Ordnance Company and the Armstrong Whitworth Shipbuilding Company, was appointed as an Additional Civil Lord on the Board of Admiralty. The post was sometimes styled Extra-Professional Civil Lord or Second Civil Lord during the periods in question. The post holder was usually held by a person who was neither a naval officer or a politician it existed briefly until 1885 before being abolished. In 1912 the post was re-established and usually held by one person. In 1917 due to the increasing workload of the Civil Lord of the Admiralty extra civil lords were added however they were restyled as