Is it common for British PMs to take office unelected?

By the Editorial Team · Wednesday, July 29, 2026

Several British prime ministers throughout history, including eight in the past century, have assumed office without winning a general election, often through internal party or parliamentary appointments. This longstanding practice highlights the UK's unique political system where unelected transitions to premiership are not uncommon and reflect both procedural norms and periods of instability.

It is more common than generally perceived for British prime ministers to assume office without having won a general election. Historical records show that several prime ministers in both the 18th and 19th centuries first entered the role via internal party or parliamentary appointments rather than direct electoral mandate.

During the 18th century, seven prime ministers began their tenure unelected. Notably, Charles Watson-Wentworth served two brief terms in 1765-66 and again in 1782 without ever having contested or won a general election. Similarly, in the 19th century, five prime ministers took office without immediate electoral endorsement. George Canning succeeded Lord Liverpool as prime minister in 1827 but passed away less than a year later, prior to contesting a general election.

In the last century, a substantial number of British prime ministers also commenced their premierships unelected. Of the 22 individuals who have held the office over the past 100 years, eight took office in this manner: Neville Chamberlain, Alec Douglas-Home, James Callaghan, Gordon Brown, Theresa May, Liz Truss, Rishi Sunak, and most recently, Andy Burnham. Within this group, two former prime ministers – Stanley Baldwin and Winston Churchill – have experienced both electoral victories and defeats during their careers.

The current perception of political instability, highlighted by six prime ministers serving in the last decade, four of whom were appointed without a general election, contrasts sharply with the period from 1979 to 2007. This era was marked by relative stability with only three prime ministers—Margaret Thatcher, John Major, and Tony Blair—occupying the post.

Historical incidents underscore the precarious nature of the office. For example, in 1809, Spencer Perceval became prime minister upon taking over from William Cavendish-Bentinck. Before he could lead the Conservative Party into a general election, Perceval was fatally shot in the lobby of the House of Commons by a disgruntled merchant, making him the only British prime minister to be assassinated while in office.

These patterns suggest that unelected transitions to the premiership are embedded within the United Kingdom’s political system, reflecting both parliamentary procedures and exceptional circumstances across centuries.

This article was reported by synthesizing coverage from multiple independent news outlets to present a balanced, unbiased account. Read about our editorial standards. Spotted an error? Let us know.