Sir Keir Starmer has finally stood down as prime minister. Here are the five moments that doomed his premiership. ► Sign up to the Telegraph's free new daily newsletter, From the Editor, bringing you the latest news, features and analysis from the Telegraph newsroom: www.telegraph.co.uk/customer/secure/newsletter/from-the-editor/?WT.mc_id=tmgoff_youtube_telegraphmain ► Get the latest headlines: www.telegraph.co.uk?WT.mc_id=tmgoff_youtube_telegraphmain ► Stay ahead with a Telegraph digital