Rob Delaney is a comedian, actor and writer, best known for co-creating the British sitcom Catastrophe, which won him a Bafta for comedy writing.     But during the height of his success, he learnt that his son, Henry, was dying of a brain tumour. He’s written a book about it in which he grapples with the fragility of life, the mysteries of death, and the question of purpose for those left behind.   In this episode, Rob joins Krishnan to talk about his new book, ‘A Heart That Works’ and why he felt it was important to tell his family’s story.   Produced by : Imahn Robertson and Nina Hodgson Photo Credit: Southbank Centre