Golden sponge cake with banana creamy filling

water 51.4% , fortified wheat flour 24.3% , sugar 12.2% , corn syrup 6.1% , high fructose corn syrup 3.0% , animal 1.5% , vegetable fat 0.8% , egg 0.4% , CONTAINS 2% and LESS 0.2% , E435 0.1% , soya lecithin 0.0% , E170i 0.0% , E516 0.0% , E406 0.0% , dextrose 0.0% , E339ii 0.0% , E410 0.0% , Modified starch 0.0% , corn syrup solids 0.0% , baking powder 0.0% , whey 0.0% , soya oil 0.0% , E422 0.0% , banana 0.0% , salt 0.0% , E466 0.0% , E481 0.0% , E200 0.0% , E202 0.0% , E415 0.0% , barley malt extract 0.0% , cornmeal 0.0% , natural and artificial flavouring 0.0% , enzyme 0.0% , E102 0.0% , E129 0.0%