Winnie-the-Pooh first appeared in book form in 1926, and the fictional teddy bear has only grown more beloved in the century since. Author Gyles Brandreth joins Piya Chattopadhyay to explore how the "pure happiness" and childhood innocence that Pooh and his friends represent help explain the enduring appeal, and why creator A.A. Milne and his son – the real-life Christopher Robin – had a love-hate relationship with Winnie-the-Pooh.