Preheat oven to 425°F Grease a baking tray or line the baking tray with parchment paper.
Mix the flour, sugar, baking powder, baking soda and salt together. Cut in the butter until the mixture resembles fine breadcrumbs. Stir in the blueberries.
Add the milk and mix to make a smooth dough (you may not need all of the milk). Knead lightly for ten seconds on a lightly floured surface. Roll to about 3/4" thick and either cut into individual scones or cut into wedges.