Max Lang and Daniel Snaddon have made some of the most beloved animated short films and specials of the last 15 years, including The Gruffalo, Stick Man and Albert. Now they're co-directors of a new short that's vying for Oscar and Annie Awards consideration, The Snail and the Whale. They discuss the book to screen adaptation, their impact on the world of animation amd working with Sally Hawkins and the late Diana Rigg.