C J Jackson, Director of the Billingsgate Seafood Training School, demonstrates how to prepare a whole fish for cooking whole. Fish recipes here www.bbc.co.uk/food/fish Subscribe here www.youtube.com/subscription_center?add_user=bbcfood Watch more high quality videos on the Food YouTube channel from BBC Worldwide here: www.youtube.com/bbcfood BBC Good Food launches new app. To download the apps please click on the following links: iOS Apple - bit.ly/OkwJMW Google Play - Android - bit.ly/Rc0wEN