Preheat oven to 200^oC. Combine sifted flour, sugar, brown sugar and baking powder in a large bowl and mix well. In a separate bowl, mix together butter, eggs and milk. Add wet mixture to dry mixture, mix lightly. Fold in the strawberries very gently. Grease or line 3 muffin trays of 6 muffin capaciy each with patty cases. Spoon batter into each patty case till 2/3^rds full. Bake for 25-30 minutes until well risen and golden.