One Dish Radio 4, 9.30am

Andi Oliver (right) hosts a new series in which she asks her guests what makes their favourite foods so good. She begins by learning the secrets of former Great British Bake Off semi-finalist Briony May Williams's soda bread, which is made using a 100-year-old family recipe.

In The Exchange (Radio 4, 8pm) strangers Helen and Amanda come together to share their very different experiences of the adoption process and swap gifts that reflect their stories.

Laurie Taylor hosts Thinking Allowed (Radio 4, 4pm), leading a discussion on topical issues and what the latest academic research tells us about the ways in which our society works.