Preheat oven to 425°F (220°C) and line a baking sheet with baking paper or a silicone baking mat.
In a large bowl, combine flour, baking powder, sugar, and salt.
Add the butter and rub it into the flour mixture with your fingers until no large pieces remain. It should blend with the flour to resemble fine bread crumbs.
Add the milk, starting with the lower amount. You probably won't need it all. You want just enough to form a slightly sticky dough.
Turn the dough out onto a lightly floured surface. Roll or press out until it's about 1/2-inch thick. Cut into 6cm (a bit more than 2 inches) rounds and place on the prepared baking sheet. Be careful not to twist when cutting as the scones may not rise as well. You can cut into different sizes if you want, but keep in mind this may affect the baking time and the yield.
Brush the tops of the scones lightly with milk (you probably have enough left over that didn't go into the scones). Bake for 12-15 minutes, until lighty golden on top. You can enjoy them warm or cold, but they are best eaten the day they're made.