Who was the first person to hold the title of Prime Minister of Great Britain?
- William Pitt the Younger
- Spencer Perceval
- Henry Pelham
- Sir Robert Walpole
Sir Robert Walpole served as Prime Minister for almost 21 years, from 1721 to 1742, as a member of the Whig party. He took office at 10 Downing Street in 1735, and also served as First Lord of the Treasury for more than two decades. He had the longest tenure of any PM to date. Source: Gov.UK, Reuters UK.