Wallace and Gromit Cheese Scones

1.10 lb plain flour
2 teaspoons baking powder
4 teaspoons cream of tartar
1/2 teaspoon English mustard powder
1/2 teaspoon cayenne pepper
0.17 lb butter
1 1/3 cup milk
0.44 lb extra mature(sharp) cheddar cheese, grated
1 egg, beaten

1. Preheat oven to 450F.
2. Mix all the dry ingredients together.
3. Rub in the butter until it remsembles crumbs.
4. Add 5 ounces of the grated cheese & mix well.
5. Add the milk and mix very quickly - do not over mix.
6. Mixture should be sticky and soft, if too dry, add more milk.
7. Place onto a floured board a knead briefly.
8. Roll out to about 1 inch thickness.
9. Stamp 12-14 rounds out of the dough - do NOT twist the scone cutters as it stops them from rising!
10. Place close together on a greased biscuit/baking tray.
11. Brush the beaten egg over each scone as a glaze and sprinkle the remaining 1 ounce of cheese over the top.
12. Bake in a pre-heated oven for 10-12 minutes until well risen and golden brown.
13. Cool slightly, then spilt them in half, butter them.