 After a Labour Party landslide win, Great Britain has a new political leader. I'm Vicki Barker in London. Britain has a new Prime Minister and a new political direction. You have given us a clear mandate, and we will use it to deliver change. Keir Starmer, leader of Britain's Labour Party, which has ended the Conservatives' 14 years in power with a massive majority, promising to beef up Britain's social safety net and restore public trust.