If this was in Canberra we woukd be tempted toa cll this 'Palaeosia undescribed species' because of the distinct white costa and pale head. Its grey not unifirm yellow overall ('Moths of the ACT' A female E. plana? Most E . plana also seem to be 'broad in the beam' (this one not so much) but most I have seem to lack a white costsa - although I notice there are some on BOLD which are grey with a yellowish white costa.