The annual stand-up comedy concert in aid of Great Ormond Street Hospital Children's Charity returns for a sixth year, with a host of stars appearing at London's O2 arena. Featuring Aisling Bea, Alan Carr, Jack Dee, Jason Byrne, Jon Richardson, Josh Widdicombe, Katherine Ryan, Kevin Bridges, Michael McIntyre, Paul Chowdhry, Rich Hall, Rob Beckett, Romesh Ranganathan, Russell Kane, Sara Pascoe, Sean Lock, Seann Walsh, Shappi Khorsandi, Trevor Noah and Warwick Davis