Angela Rippon, Gloria Hunniford and Julia Somerville expose more secrets of the food business, investigating whether special offers and packaging are always everything they seem, and going undercover in the wine aisles to discover if all those supermarket wine deals really do offer value for money. Plus, a man angry at the appearance of his frozen fish goes behind the scenes of a food photography shoot to discover why the picture on the packet can so often look rather different from the food inside. And, how hard is it to buy just British? A family reveals the results of a year-long experiment, with examples of foods that may look like they're made in the UK but in fact come from further afield.