Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the all-purpose flour, baking powder, salt, and granulated sugar.
Add the cold, cubed butter to the dry ingredients and use a pastry cutter or your fingertips to work the butter into the flour mixture until it resembles coarse crumbs.
Pour in the cold milk and gently fold until the dough just begins to come together. Be careful not to overmix.
Gently fold in the fresh or frozen berries, being careful not to crush them.
Turn the dough out onto a lightly floured surface and knead it a few times, just until it comes together.
Pat the dough into a round, about 3/4-inch thick. Use a sharp, floured biscuit cutter to cut out scones, pressing straight down without twisting.
Arrange the scones on the prepared baking sheet, spacing them about 2 inches apart.
Brush the tops of the scones with a bit of milk.
Bake for 12-15 minutes, or until the scones are golden brown.
Serve the warm fruit scones with clotted cream and your favorite jam or honey.