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 Irish Scottish Welsh Others Two other Prime Ministers are known to have had Jewish ancestors: Britain's Prime Ministers have been predominately Anglican by denomination, in an office which has had input into the appointment of that Church's bishops. The first to hold the office from outside the English established church was Lord Bute, who was a member of the Scottish Episcopal Church, while the Duke of Grafton was the first to convert away by formally becoming a Unitarian, after leaving office. Tony Blair is the only British Prime Minister to become a Roman Catholic, albeit he converted after leaving office.