Sieve 8 ounces of self raising flour in a bowl with 1/4 teaspoon of salt, 1 teaspoon of baking powder and a teaspoon of English mustard powder.
Rub in 2 ounces of butter until the mix looks like fine breadcrumbs and mix in 3 ounces of grated mature cheddar cheese.
Mix with 100 ml or so of cold milk and turn out on to a floured board and shape into a rectangle rolling gently with a rolling pin until they’re about an inch thick. Cut into squares or triangles, brush with milk and sprinkle fresh chives, Italian hard grated cheese, paprika or chilli powder on top.
Bake 180/190 for 8 – 10 minutes. Cool on a rack.