Step 1: Preheat the oven to 220°c (200°fan). Line a large baking sheet with baking paper.
Step 2: In a large bowl rub together the flour, salt and butter until you get a fine breadcrumb consistency.
Step 3: Stir in the caster sugar with a metal knife.
Step 4: Pour the buttermilk and orange zest in a microwaveable bowl and heat for 30 seconds then pour into the flour. Mix with a knife then bring together with your hands into a soft dough.
Step 5: Place the dough on a floured surface, shape into a round, about 4cm thick and stamp out 8 scones using a 4cm cutter.
Step 6: Place the scones on the baking tray, glaze with milk and bake for 10 minutes.
Step 7: Whilst the scones are cooling make the chocolate ganache. Chop the chocolate into small pieces and place in a bowl.
Step 8: Heat the cream in a pan until it just reaches a simmer. Pour over the chocolate and leave it for a few minutes. Mix together with a wooden spoon until smooth then stir in the orange zest.
Step 9: Assemble the chocolate orange scones. Split each scone in half, spread with ganache and top with clotted cream. Sprinkle any leftover orange zest on top and decorate with white chocolate stars.