In a large mixing bowl, whisk together the flour, baking powder, sugar, salt, and orange zest.
Add the cold butter and use your fingertips or a pastry cutter to rub it into the flour mixture until it resembles coarse crumbs.
Stir in the chopped cranberries.
Gradually pour in the cold heavy cream, stirring with a fork or spatula until a shaggy dough forms.
Turn the dough out onto a floured surface and gently knead no more than 8–10 times—just until it holds together.
Pat the dough into a round disk about 3–4 cm thick. Cut into 10 wedges or use a floured round cutter to create circles.
Place the scones on a parchment-lined baking sheet, leaving about 1 inch between them.
Bake at 220°C (428°F) for 12 to 15 minutes, or until golden on top.
Let cool slightly and enjoy warm or at room temperature.