Hi julie..when we applied our visa (me n my son) last october 2012..I supplied the same documents u mentioned above plus affidavit of Sole Custudy and Sole Responsibility and also Affidavit of Illigitimacy notarized by a lawyer...my son is using his biological fathers surname..but i explained why in my supporting letter that we never married and no contact with my son since he was born...hope it will help u in ur application...