Conservative MP James Gray says Penny Mordaunt is the party leadership candidate most feared by Labour and would make a first class prime minister. He tells Bloomberg's Stephen Carroll and Yuan Potts Mordaunt's economic approach would be 'sound, sensible and cautious'. Plus: how important are campaign videos in this election? Author and journalist Sam Delaney reviews the offerings from the Tory contenders, and discusses whether the golden age of political advertising is long gone.