Secrets of Your Supermarket Food

It is thought that more than seven million tons of food is thrown away every year as a result of confusion over food labelling. Here, Environmental Health Officer Gareth Jones helps decipher the difference between `best before', `use by' and `display until'. Sian Williams investigates the safety of supermarket pork, and Stefan Gates finds out about the challenges facing the Scottish salmon industry and also tests the difference between fresh and frozen fish.