<Table> <Tr> <Th colspan="2"> Prime Minister of the United Kingdom of Great Britain and Northern Ireland </Th> </Tr> <Tr> <Td colspan="2"> Royal Arms used by Her Majesty 's Government </Td> </Tr> <Tr> <Td colspan="2"> Incumbent Theresa May since 13 July 2016 ( 2016 - 07 - 13 ) </Td> </Tr> <Tr> <Td colspan="2"> <Ul> <Li> Government of the United Kingdom </Li> <Li> Office of the Prime Minister </Li> </Ul> </Td> </Tr> <Tr> <Th> Style </Th> <Td> <Ul> <Li> The Right Honourable ( within the UK and the Commonwealth ) </Li> <Li> His / Her Excellency ( in international correspondence ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Member of </Th> <Td> <Ul> <Li> Cabinet </Li> <Li> Privy Council </Li> <Li> European Council </Li> <Li> British -- Irish Council </Li> </Ul> </Td> </Tr> <Tr> <Th> Reports to </Th> <Td> Parliament </Td> </Tr> <Tr> <Th> Residence </Th> <Td> <Ul> <Li> 10 Downing Street </Li> <Li> Chequers </Li> </Ul> </Td> </Tr> <Tr> <Th> Seat </Th> <Td> Westminster </Td> </Tr> <Tr> <Th> Appointer </Th> <Td> Monarch of the United Kingdom by convention , based on appointee 's ability to command confidence in the House of Commons </Td> </Tr> <Tr> <Th> Term length </Th> <Td> At Her Majesty 's pleasure </Td> </Tr> <Tr> <Th> Inaugural holder </Th> <Td> Sir Robert Walpole as First Lord of the Treasury and de facto first Prime Minister . </Td> </Tr> <Tr> <Th> Formation </Th> <Td> 4 April 1721 </Td> </Tr> <Tr> <Th> Salary </Th> <Td> £ 143,462 annual , including £ 74,962 MP 's salary </Td> </Tr> <Tr> <Th> Website </Th> <Td> Official website </Td> </Tr> </Table>
how long is a prime minister term in uk
At Her Majesty 's pleasure