Preheat the oven to 450 degrees F (230 degrees C). Line a cookie sheet with a silicone baking mat (such as Silpat®).
Combine oats, flour, sugar, baking powder, and salt in a large bowl. Make a well in the center; pour in butter, milk, and beaten egg. Mix together until a moist dough forms. Fold in berries.
Turn dough out onto a lightly floured surface and pat into an 8-inch round, about 3/4 inch thick. Cut into 8 wedges. Brush cream over scones and sprinkle tops with turbinado sugar. Arrange on the prepared cookie sheet.
Bake in the preheated oven until golden brown, 10 to 12 minutes.