Chicken, Bacon and Leek Pie

potato 35.5% , british chicken 16.0% , water 11.0% , cow's milk 11.0% , leek 6.0% , mature cheddar 5.0% , Beechwood Smoked British Bacon Lardons with Added Water 4.0% , red leicester 2.0% , butter 1.8% , double cream 1.8% , extra mature cheddar 1.5% , corn flour 0.8% , fortified wheat flour 0.8% , salt 0.8% , mustard 0.8% , white pepper 0.8% , bay leaf 0.8%