3/4 cup reduced fat buttermilk
1/3 cup superfine sugar
  grated zest of 1 lemon
2 cups unbleached all purpose flour (plus extra for dusting the work surface)
1 tablespoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt
4 tablespoons unsalted butter (cut into small cubes)
1 cup finely chopped fresh strawberries
2 tablespoons heavy (whipping) cream
  strawberry jam (optional, for serving)
  confectioner's sugar (optional, for serving)
  whipped or clotted cream (optional, for serving)