<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> The article lists the records of Prime Ministers of Great Britain and of the United Kingdom since 1721 . </P> <P> The Prime Minister with the longest single term was Sir Robert Walpole, lasting 20 years and 314 days from 4 April 1721 until 11 February 1742 . This is also longer than the accumulated terms of any other Prime Minister . </P> <P> The shortest period in office is more confused, depending on the criteria . The shortest ever period was only three days, a record held by Lord Bath, from 10 February to 12 February 1746, who was asked to form a government but was unable to find more than one person who would agree to serve in his cabinet . A satirist of the time wrote: "the minister to the astonishment of all wise men never transacted one rash thing; and, what is more marvellous, left as much money in the Treasury as he found in it ." James Waldegrave, 2nd Earl Waldegrave was a prime minister for four days, from 8 June to 12 June 1757 . However, since neither of these Earls actually formed an effective government, there are other contenders for the record of shortest term of office among those who actually governed the country . </P>

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