Lemon curd cake

cake 51.5% , icing 17.7% , fortified wheat flour 15.4% , sugar 7.7% , liquid whole egg 3.9% , water 1.9% , semi-skimmed milk 1.0% , vegetable fat 0.5% , Margarine 0.2% , baking powder 0.1% , vegetable oil 0.1% , glucose syrup 0.0% , Modified starch 0.0% , artificial 0.0% , natural flavouring 0.0% , whey powder 0.0% , salt 0.0% , rice starch 0.0% , citrus fibre 0.0% , soya lecithin 0.0% , dextrose 0.0% , E202 0.0% , E466 0.0% , E414 0.0% , E415 0.0% , lemon curd filling 0.0% , confectionery topping 0.0% , palm kernel oil 0.0% , skimmed milk powder 0.0% , whole milk powder 0.0% , whey powder 0.0% , palm oil 0.0% , soya lecithin 0.0% , vanilla 0.0%