The existing system of certificates and units is complex and where reassessment has been introduced in England and Scotland, it has highlighted difficulties when certificates require renewal.
Mae’r system bresennol o ran tystysgrifau ac unedau’n gymhleth a lle mae trefn ailasesu wedi cael ei chyflwyno yn Lloegr a’r Alban, mae wedi amlygu anawsterau pan fo’n ofynnol adnewyddu tystysgrifau.