Preheat the oven to 180°C.
Mix the flour, baking powder, sugar and flour.
Fry the bacon in a frying pan until crispy.
Beat the egg lightly, then mix with the oil and buttermilk and add this to the flour mixture. Stir in the bacon pieces (including the fat) and add the cheese cubes.
Line a muffin tin with paper baskets or put some silicon moulds on a tray. Spoon the batter into them (up to ⅔rd) then grate some cheese on the top and bake for 20 minutes or so until golden.
Leave them to cool on a wire rack.