Fish pie

potato 41.3% , semi-skimmed milk 19.2% , alaska pollock 19.2% , water 6.4% , haddock 6.4% , cheddar 2.4% , single cream 1.7% , fortified wheat flour 1.7% , corn flour 0.3% , white wine 0.3% , butter 0.3% , salt 0.3% , extra mature cheddar 0.3% , palm oil 0.3% , rapeseed oil 0.3% , parsley 0.3% , fish gelatine 0.3% , yeast 0.3% , E150a 0.0% , E160c 0.0% , E160b 0.0% , white pepper 0.0% , sunflower oil 0.0% , E100 0.0% , turmeric 0.0%