Records of Prime Ministers of the United Kingdom transitions between reigns, eight Prime Ministers each served under two sovereigns: George III had 14 Prime Ministers serving during his 59-year reign (reigned 1760–1820), beginning with the Duke of Newcastle. The last incumbent, Lord Liverpool, was the only one appointed by his son (the Prince Regent) during the father's final incapacity to rule. In downward numerical order, numbers of Prime Ministers in office during other reigns are: Only six Prime Ministers came to serve office under sovereigns in whose own reigns they were born. The present Prime Minister, Theresa May, is the third Prime Minister to have been born in
Historical rankings of Prime Ministers of the United Kingdom judged to be Anthony Eden. Historian Francis Beckett ranked the 20th-century prime ministers with points out of five in 2006, based on how well the leaders implemented their policies—not on the policies themselves. Margaret Thatcher and Clement Attlee shared the highest ranking. In September 2008 the BBC "Newsnight" programme conducted an online poll. Asking voters to decide who they thought was the greatest and worst of post-war prime ministers. 27,000 people responded, and decided that Winston Churchill was the greatest, with Attlee second. The full results were: In a BBC poll to find the 100 Greatest Britons in 2002, five