Preheat the oven to 220°C (200°C fan) or Gas Mark 7.
Grease 2 baking trays or line them with baking paper.
Sift the self-raising flour and baking powder into a large bowl. For lighter, fluffier scones, try sifting your flour from as high as you can — it helps aerate the mixture beautifully.
Add the softened butter and rub it in with your fingertips until the mixture resembles fine breadcrumbs.
Stir in the caster sugar and mixed dried fruit.
Break the egg into a measuring jug and add enough milk to reach 150ml (¼ pint). Beat the mixture lightly.
Pour the egg and milk mixture into the flour mixture and stir to form a soft, but not sticky, dough.
Lightly flour your work surface, turn out the dough, and knead it gently. Roll it out to about 1cm (½ inch) thickness.
Use a fluted 5cm (2 inch) cutter to cut rounds and place them on the prepared baking trays.
Brush the tops of the scones with a little milk for a golden finish.
Bake in the preheated oven for about 10 minutes or until the scones are pale golden brown.
Transfer the baked scones to a wire rack to cool.
Serve fresh with strawberry jam, clotted cream, or your favorite toppings.