Lord of the Rings' Andy Serkis and Veep creator Armando Iannucci and director Chris Addison are among the hundreds of thousands of protestors at an anti-Brexit march in London today. The pair have been joined by the likes of Dragon's Den star Deborah Meaden and TV chef Delia Chef at the event in the British capital, with a series of speeches being compered by Richard Bacon, host of Nat Geo's Explorer, and Mariella Frostrup. The police have not released official figures…