Heat the oven to 220℃/200℃ Fran (425℉)
Line a baking tray with parchment paper or other non-stick liner.
Put 500 g (4 cups) self-raising flour and 2 tsp baking powder in a bowl with 100 g (3½ oz) butter.
Use a knife or pastry cutter to cut the butter into the flour. Then use your fingertips to rub the butter through the four until it looks like breadcrumbs.
Add 75 g (½ cup) caster sugar and stir through.
Add the orange zest and 100 g (⅔ cup) dried cranberries
Crack two eggs into a jug and beat with a fork.
Gradually add this mixture to the flour bringing the liquid and flour together. Add milk a little at a time until you have a soft dough.
Pat the dough out to about 2cm (3/4 inch)
Use a cookie cutter to cut out rounds and place on the baking tray
Break the third egg into a bowl and beat, then brush the tops of the scones with the egg.
Sprinkle with 2 tbsp demerara or granulated sugar.
Bake for about 10 - 12 minutes until the scones are pale golden brown.
Remove from the baking sheet and cool on a wire rack.
Serve with butter or for special occasions with jam and whipped cream.