Beat egg whites in medium bowl with electric mixer until soft peaks form; gradually add sugar, beat until dissolved between additions. Beat in egg yolks and golden syrup. Triple sift dry ingredients, fold into mixture. Divide mixture evenly between prepared pans. Bake in a moderate oven about 18 minutes. Turn sponges immediately onto wire racks to cool. Beat cream until soft peaks form, join cakes with cream. Dust top with a little sifted icing sugar, if desired.