* 1 tsp dried active yeast * 1 tsp demerara sugar * 200 g plain flour * ¼ tsp salt * ½ tsp baking powder * 1 Tbsp vegetable oil * 2 Tbsp natural yoghurt * 2 Tbsp milk * 1 small bowl * 1 teaspoon * 1 tablespoon * 1 mixing bowl * 1 rolling pin * 1 oven tray * 1 pastry brush * 1 tea towel.