However the intention is still to base the domain on administrative data drawn from the benefits and tax credits systems, and from the Home Office for supported asylum seekers.
Fodd bynnag, y bwriad o hyd yw parhau i seilio'r maes ar ddata gweinyddol o'r system fudd-daliadau a'r system credydau treth, a data'r Swyddfa Gartref ar geiswyr lloches sy'n derbyn cymorth.