Place the self raising flour, salt, sugar and butter into a mixing bowl and crumble ingredients together.
Add the milk gradually and mix to a smooth dough. Depending on the kind of scones you are making add sultanas, glacé cherries or cheese knead into a ball and roll out to 1/2 inch thick and cut into rounds. Brush scones with beaten egg and place on a baking tray.
Bake in a preheated oven at 450°F/ 230°C (Gas 7/8) for 12-15 minutes.