Preheat your oven to 200°C/180°C(fan)/400°F/Gas 6.
Sift 300 g Self-raising flour into a mixing bowl and add 1 teaspoon Baking powder, and 1 pinch Sea salt.
Add 30 g Butter and rub with your fingers to make a crumble consistency.
Add 200 ml Lemonade. Mix to form a workable dough
Put the dough onto a flour dusted surface. Roll out to 2cm/1in thick.
Use a 6cm/2.5in cookie cutter to cut out 8 disks. Put them onto a lined baking tray and brush with 1 Egg. Only brush the tops - make sure it doesn't drip down the sides.
Bake for 12-14 minutes. Once cooked, cool on a wire rack.
Notes
Make sure you preheat your oven before you do anything else. The oven needs to be hot when the scones go in, so that you get those golden bits of top, but they are still light and fluffy inside.
Make sure you sift the flour so there are no lumpy bits.
If you didn't want to use egg, you could brush the top of the scones with cream instead.
Make sure you don't overwork the dough, as you will end up with tough dense scones.
When cutting out the scones, use a sharp cutter. A blunt cutter can compress the edges of the scones, which can prevent them from rising properly. I like to use a round cutter that's about 6cm/2.5in diameter.
Do not twist the cutter when pressing down on it, as tempting as it might be, if you twist, the sides of the scones gets “smushed” which affects how well they rise.
You can finish these scones with lemonade off with a dusting of icing sugar before serving.