Mairi Hedderwick, author and illustrator, talks about her most famous creation, Katie Morag, and offers some wry insights and observations from behind the scenes of the multi award-winning TV series. In conversation with one of the writers of the Katie Morag stories on CBeebies and CBBC, Martin McCardie, Hedderwick explores the enduring popularity of Katie and discusses life beyond the isle of Struay to talk about painting, illustrating and travel-writing.