Young's Cod Steak in a butter sauce

cod 49.0% , water 23.9% , milk proteins 14.5% , butter 2.0% , cream 2.0% , corn flour 1.0% , wheat flour 1.0% , salt 0.5% , lemon juice 0.5% , parsley 0.5% , onion 0.5% , yeast extract 0.5% , black pepper 0.5% , Colour 0.5% , E100 0.5% , flavouring 0.5% , cereals containing gluten 0.5% , caution! although extra care has been taken to remove all bones 0.5% , some may remain 1.6%