Inside the Factory: Beans

Gregg Wallace helps to unload 27 tonnes of dried haricot beans from North America, and follows them on a one-and-a-half mile journey through the largest baked bean factory in the world. Meanwhile, Cherry Healey follows a discarded baked bean can through a recycling centre and on to the largest steelworks in the UK, and historian Ruth Goodman reveals how tinned food was invented to improve sailors' nutrition