Andy West talks to Michael Rosen about his work discussing philosophy in prisons around England. His book The Life Inside is a memoir of his own experience of the justice system through his family. His father, brother and uncle all spent long stretches in jail. Andy talks about the various meanings words such as 'freedom' 'hope' and 'time' have to prisoners. The conversations he has with them as part of the philosophy course are revealing as well as often poignant and humorous.

Producer: Maggie Ayre for BBC Audio Bristol