Martin Yorworth is a fisherman from Canvey Island, within the Thames estuary. He fishes in a traditional way by seeing what he can catch and then trying to sell it at Londonís farmersí markets. Through the seasons there are eels, crabs, Dover sole, sea bass, mackerel, flounder, smelt and lots of sprats. On a recent trip out on his trawler boat he netted 2 tonnes of sprats in 5 minutes.