<P> Prior to 1902, the Prime Minister sometimes came from the House of Lords, provided that his government could form a majority in the Commons . However as the power of the aristocracy waned during the 19th century 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 . </P> <P> 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 . </P> <P> The Prime Minister is the head of Her Majesty's Government in the United Kingdom . As the "Head of Her Majesty's Government" the modern Prime Minister leads the Cabinet (the Executive). In addition the Prime Minister leads a major political party and generally commands a majority in the House of Commons (the lower house of the legislature). As such the incumbent wields both legislative and executive powers . Under the British system there is a unity of powers rather than separation . In the House of Commons, the Prime Minister guides the law - making process with the goal of enacting the legislative agenda of their political party . In an executive capacity the Prime Minister appoints (and may dismiss) all other cabinet members and ministers, and co-ordinates the policies and activities of all government departments, and the staff of the Civil Service . The Prime Minister also acts as the public "face" and "voice" of Her Majesty's Government, both at home and abroad . Solely upon the advice of the Prime Minister, the Sovereign exercises many statutory and prerogative powers, including high judicial, political, official and Church of England ecclesiastical appointments; the conferral of peerages and some knighthoods, decorations and other honours . </P> <Table> <Tr> <Th> United Kingdom </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> This article is part of a series on the politics and government of the United Kingdom </Td> </Tr> <Tr> <Td> Constitution (show) <Ul> <Li> Constitution <Ul> <Li> Cabinet Manual </Li> <Li> Erskine May </Li> </Ul> </Li> <Li> Taxation </Li> </Ul> </Td> </Tr> <Tr> <Td> The Crown (show) British Monarchy <Ul> <Li> Monarch <Ul> <Li> Queen Elizabeth II </Li> </Ul> </Li> <Li> Heir apparent <Ul> <Li> The Prince of Wales </Li> </Ul> </Li> <Li> Royal family </Li> <Li> Succession to the British throne </Li> <Li> Royal prerogative </Li> </Ul> </Td> </Tr> <Tr> <Td> Executive (show) HM Government <Ul> <Li> Prime Minister <Ul> <Li> Theresa May </Li> </Ul> </Li> <Li> Cabinet <Ul> <Li> Current ministry </Li> </Ul> </Li> <Li> Her Majesty's Civil Service </Li> <Li> Departments </Li> <Li> Executive agencies </Li> <Li> Public bodies </Li> </Ul> Privy Council <Ul> <Li> Crown - in - Council <Ul> <Li> Queen Elizabeth II </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Td> Legislature (show) Parliament (56th Parliament) Crown - in - Parliament <Ul> <Li> Queen Elizabeth II </Li> </Ul> House of Lords <Ul> <Li> Lord Speaker <Ul> <Li> The Lord Fowler </Li> </Ul> </Li> </Ul> House of Commons <Ul> <Li> Speaker <Ul> <Li> John Bercow </Li> </Ul> </Li> <Li> Leader of the Opposition <Ul> <Li> Jeremy Corbyn </Li> </Ul> </Li> </Ul> <Ul> <Li> Her Majesty's Loyal Opposition </Li> <Li> Shadow Cabinet </Li> <Li> State Opening of Parliament </Li> <Li> Prime Minister's Questions </Li> <Li> Act of Parliament </Li> <Li> Statutory Instruments </Li> </Ul> </Td> </Tr> <Tr> <Td> Judiciary (show) Supreme Court <Ul> <Li> President <Ul> <Li> Lord Neuberger </Li> </Ul> </Li> <Li> Deputy President <Ul> <Li> Lady Hale </Li> </Ul> </Li> <Li> Judges of the Supreme Court </Li> </Ul> <Ul> <Li> Courts of the United Kingdom </Li> <Li> Courts of England and Wales </Li> <Li> Courts of Scotland </Li> <Li> Courts of Northern Ireland </Li> </Ul> </Td> </Tr> <Tr> <Td> Devolution (show) <Ul> <Li> Joint Ministerial Committee </Li> <Li> Scotland <Ul> <Li> Government </Li> <Li> Parliament </Li> </Ul> </Li> <Li> Wales <Ul> <Li> Government </Li> <Li> National Assembly </Li> </Ul> </Li> <Li> Reserved matters </Li> <Li> Northern Ireland <Ul> <Li> Executive </Li> <Li> Assembly </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Td> Administrative geography (show) <Ul> <Li> England <Ul> <Li> Subdivisions of England </Li> <Li> Local government in England </Li> </Ul> </Li> <Li> Scotland <Ul> <Li> Subdivisions of Scotland </Li> <Li> Local government in Scotland </Li> </Ul> </Li> <Li> Wales <Ul> <Li> Local government in Wales </Li> </Ul> </Li> <Li> Northern Ireland <Ul> <Li> Local government in Northern Ireland </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Td> Elections (show) <Ul> <Li> Parliament constituencies </Li> <Li> Political parties </Li> <Li> Last election </Li> <Li> Next election </Li> <Li> Referendums </Li> </Ul> </Td> </Tr> <Tr> <Td> Foreign relations (show) <Ul> <Li> History </Li> <Li> Foreign policy </Li> <Li> UK and the United Nations </Li> <Li> Politics of the European Union </Li> <Li> Commonwealth of Nations </Li> </Ul> </Td> </Tr> <Tr> <Td> United Kingdom portal <Ul> <Li> Other countries </Li> <Li> Atlas </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

What does the prime minister of the uk do
find me the text answering this question