3tbsp (45g) butter(The butter should be chilled but not so hard that you can't rub it into the flour)
Pre-heat the oven to 180ºC/350ºF and line a baking sheet with baking/parchment paper.
Combine all the dry ingredients in a mixing bowl. Rub the butter into the flour until the mixture resembles bread crumbs/almond flour.
Whisk the egg into the buttermilk and pour into the dry ingredients. Mix with a fork until the mixture just comes together then tip out onto a floured surface.
Lightly bring the dough together into a disc approximately 3-5cm/1-2 inches high. Using a round cutter, cut scones out of the dough and place onto the prepared baking sheet. Press the dough together and continue cutting until all the dough has been used.
Brush the top of the scones with heavy/whipping cream and place in the oven to bake for 15-20 mins until golden brown and cooked through.
Remove from the oven and allow to cool for 10 minutes before serving.