Historical rankings of Prime Ministers of the United Kingdom from his second term only. In 2013, a group of academic staff and students at Royal Holloway, University of London, conducted a postal survey of British Members of Parliament, asking them to evaluate the success of post-war British prime ministers. Some 158 MPs replied to the survey, a response rate of 24%. The respondents included 69 Conservatives, 67 Labour MPs, 14 Liberal Democrats and 8 MPs from other parties. The survey used the same question employed in the 2004 and 2010 University of Leeds studies: MPs were asked how successful or unsuccessful they considered each Prime Minister to have been
Records of Prime Ministers of the United Kingdom Eleven Prime Ministers have served their entire terms as Members of the House of Commons but were elevated to the House of Lords afterwards by being created peers: In contrast 17 Prime Ministers preceding the current (Theresa May) have never become members of the House of Lords. Henry Pelham (served 1743 to his death in 1754) was the first to be a lifelong 'Commoner' but the convention of Prime Ministers leading from the House of Commons only became established in the 20th century. Holders of Irish peerages (with the exception of 28 Irish representative peers allowed after 1801, who were