Pre-heat oven to 190°C.
Mix the flours, bicarbonate of soda, baking powder, mustard powder and salt together.
Mix in the grated cheeses.
Add the cider and bring the mixture together with a fork to form a dough.
Tip out onto a well floured work surface and knead for a minute
Shape into a dome, flour the surface and cut a deep cross into the top.
Bake for 40 minutes or until the base sounds hollow when knocked.
Place loaf on a wire rack to cool.