Heat oven to 220'C fan forced. Grease scone tray or oven slide. Sift flour, salt and skim milk. Cut butter into flour and using fingers rub in lightly. Mix to a soft dough with milk. Turn on to a floured surface and knead slightly. The less the dough is handled, the lighter the scones will be. Flatten out with heel of hand to approx 2-3cm in thickness. Stamp out with scone cutter or glass dipped in flour. Place scones touching each other on tray, glaze tops with milk or egg yolk. Bake 8-10 minutes. Serve with jam and cream.