The healthy-eating guidelines suggest you should eat at least two portions of fish a week and one of those should be oily. A new book, Fish: Recipes from the Sea, aims to encourage us to be more ambitious in our fish-eating.

The chef CJ Jackson was a consultant for the book and she runs the Billingsgate Seafood Training School in London's East End. Today presenter Evan Davis went to meet CJ and some of her colleagues to find out how our tastes are changing.

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