Aardman Animation's world famous animated sheep is being adopted by Natural England to teach children how to behave in the countryside, in a new campaign which aims to teach how to 'respect, protect and enjoy' it. The UK's first indoor salmon farm could be built in Cleethorpes. The company behind it says it's a safe and efficient way to produce fish and avoids the potential problems of sea lice, pollution and escapes faced by farms at sea or in lochs. Opponents say it's factory farming. All week we're looking at growing the ingredients for medicines. Today we hear about animal products in pharmaceuticals. Presented by Charlotte Smith and produced by Beatrice Fenton.