Sir Anthony Seldon Johnson at 10

Removals companies (and wallpaper hangers) have been busy in Downing Street over the last 12 months as one PM leaves and another one takes their place. Few are as well placed to comment on this game of musical chairs than Anthony Seldon, political biographer and author of the 'at 10' series which has covered May, Cameron and now Boris Johnson's tenure behind that famous black front door. In his latest book he maps Johnson's time in power across ten decisive moments and sheds light on the explosive period in office of the most divisive and inscrutable prime minister since Margaret Thatcher.