IN the world of politics nothing is certain – including a prime ministers time in office.
But who currently holds the record as the shortest-serving UK prime minister and who remained in office the longest?
Who is the shortest serving prime minister?
In July 2022, Boris Johnson’s resignation put him among the top five shortest serving prime ministers in the post-war period.
And as Liz Truss faces pressure from her own party to step down, she too could make history as the shortest serving UK prime minister, if she resigns.
If this happens, Ms Truss will take George Canning's place as the shortest serving prime minister in history.
George Canning remained in power for just 119 days in 1827, before passing away at the age of 57.
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Here's who joins George Canning and Boris Johnson on the list of the shortest serving prime ministers.
Alec Douglas-Home (363 days)
Sir Alec Douglas-Home only served as Prime Minister for 363 days in October 1963 – 16 October 1964 and is therefore considered to be the shortest serving prime minister post-war.
During his time in office, he oversaw the abolition of resale price maintenance and took a tough stance in dealing with the trade unions.
He resigned in October 1964 – some Conservative MPs blamed press criticism for the leader's sudden departure.
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Anthony Eden (1 year and 279 days)