Preheat the oven to 220 degrees Celsius / 428 Fahrenheit with top and bottom heat.
Place the flour and baking soda in a bowl, then cut the cold butter into cubes and add them to the bowl. Add these to the bowl. Knead with your fingers until you have a crumbly dough.
Then add the fresh parsley, chives, grated cheese and salt to taste and mix briefly. Add the milk and mix until a smooth dough forms. The dough may be slightly flaky and loose, but that's what makes scones so charming.
Shape the dough into a ball with your hands. Sprinkle some flour onto your work surface and roll out the dough until it is about the thickness of a finger joint. Use a cookie cutter to cut out circles. If you can't cut any more circles, shape the dough back into a ball, roll it out again and keep going until you've used it all up.
Place the circles on a baking sheet lined with parchment paper and brush with a beaten egg yolk mixed with a dash of milk. Sprinkle with extra grated cheese and fresh herbs to taste.
Bake in the oven for 12–15 minutes until golden brown. Enjoy!