1. Sift wholemeal flour,flour,soda and baking powder into a bowl.Return husks left in the sifter to flour in the bowl.Cut butter into flour mixture until it resembles bread crumbs.Stir in the sugar and yoghurt.Add sufficient milk to mix to a soft dough.Lightly dust an oven try with flour.Press scone dough out to a 20cm round.Mark into 8 wedges.Brush top with milk.Bake at 220*C/425*F for 10 minutes or untill pale golden.