Preheat oven to 400C/200F/ gas 6 and line a 9x5 inch loaf tin with grease proof paper and grease
Sift flour,sugar salt and baking powder into a mixing bowl
Add cornmeal,mix in,make a well in middle
Whisk together milk,eggs,butter and margerine,pour mixture into well.Stir until just blended,you must not overstir
Place in tin and bake until a skewer inserted in the centre comes out clean, about 40 -45 minutes.
Serve hot or at room temperature.