"Growing demand and industrial fishing techniques are pushing some populations of cod and tuna to the brink of collapse. Meanwhile, millions of tonnes of less marketable fish are used as fertiliser, fish food, or simply discarded. According to some experts, 90 percent of the world's fish stocks are being fished at or beyond their sustainable limits. Soleshare, a tiny startup based in east London, is challenging this worrying trend by encouraging its members to do one thing – eat a wider variety of sustainably-caught fish. Sylvia Rowley joins a fisherman off the coast of Newhaven and takes part in a SoleShare workshop designed to get customers hooked on sustainable seafood..."