A ravenous rat craves buns, biscuits and all sweet things and as he tears along the highway, he is on the lookout for sugary treats to steal, but his sweet tooth leads him toward a sticky end. Rob Brydon narrates the animated comedy based on the book by Julia Donaldson and Axel Scheffler, with the voices of David Tennant, Nina Sosanya, Tom Hollander and Frances de la Tour