Sir Keir Starmer is set to become the UK's first Labour prime minister since 2010 after his party's landslide general election victory. Labour is returning to power with a huge parliamentary majority of 174, following a collapse in support for the Conservatives. Sir Keir will be formally appointed by the King at Buckingham Palace later, replacing Tory leader Rishi Sunak, and make his first speech in Downing Street. Speaking outside No 10, Mr Sunak vowed to remain his party's leader...