New series. Gregg Wallace goes behind the scenes with Britain's biggest food retailers to discover how technology and science are being used to bring consumers their food. In the first episode, Gregg examines the ways that supermarkets are fighting to be first with the latest food fashions, and discovers how online shopping is transforming the way people purchase their food and what they put in their trolleys. He joins Tesco's Head of Plant Innovation as he invents new vegan meals that he claims will taste like meat, and also finds out how Asda are using ingenious growing techniques to make their tomatoes sweeter than strawberries.