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
Prime Minister of Saudi Arabia 1960, allowing Saud to reclaim the reins of government, but continued discontent saw Faisal return as prime minister in 1962. After the deposition of Saud in 1964, Faisal succeeded him as king, while remaining prime minister. Since then the two offices have been merged. However, since the reign of King Khalid, others have done much of the "heavy lifting" as the king was either unwilling or unable to carry the workload, especially as the kingdom became a gerontocracy during the 1990s and 2000s. Royal Favorites achieved power to become "de facto" prime ministers. The current one is the King's son