Preheat the oven to 210 degrees (190 fan). Lightly grease a baking sheet, or line with baking paper.
Add the flour to a large bowl, along with the baking powder and seasonings. Add the butter, then rub the flour and butter mix together between your fingers and thumbs. The butter and the flour will gradually bind together until the mixture looks like fine breadcrumbs. Shake the bowl gently to bring any remaining lumps to the surface, and continue until all the lumps have gone.
Set aside one tablespoon of the grated cheese, and add the remainder of the cheese to the bowl. Stir in.
Add the beaten egg and stir in. Add most of the milk, and bring the mixture together with a knife. The dough should stick together, but not be too wet and sticky. Add the remaining milk if necessary to get the dough to stick together. Use your hands to bring the mixture together into a ball.
Place the dough on a floured board or worktop, and press it into a circle about an inch (2.5cm) thick. Cut out the scones with a pastry cutter, or cut into triangles with a knife. Sprinkle with the remaining grated cheese.
Place the scones on the prepared baking sheet and bake for 12-15 minutes. If necessary, turn partway through. Cool on a wire rack.