Once a cheap dish to feed workers, salted cod has been preserved by cooks around the world who serve it to celebrate: On Sundays, at Carnival, at Christmas. It's an ingredient which has played a part in the forming of empires, fuelled armies and cured hangovers. Sheila Dillon meets cooks and hears the enduring and surprising stories of cuisines shaped by salt fish. She asks why some of the best new British chefs are choosing to include saltfish on their menus.

Presented by Sheila Dillon