LONDON, Oct 20 (Reuters) - Liz Truss resigned as prime minister on Thursday 44 days after starting the job, making her Britain's shortest-serving premier.
* The Duke of Devonshire - 225 daysWilliam Cavendish, the 4th Duke of Devonshire and a Whig, was seen as de facto prime minister during a caretaker government and stepped down in June 1757.
* The Earl of Shelburne - 265 daysDublin-born William Petty, the 2nd Earl of Shelburne, was in office when the treaty of Paris, which ended the American War of Independence, was signed.
* The Earl of Bute - 317 daysJohn Stuart, third Earl of Bute, was the first prime minister from Scotland after the Acts of Union in 1707.
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