The national support telephone number will be staffed between 8.30am to 5pm Monday to Thursday and 8.30 to 4.30pm Friday.
Bydd rhywun ar gael i ateb y llinell ffôn gymorth genedlaethol rhwng 8.30 a 5 o ddydd Llun i ddydd Iau, a rhwng 8.30 a 4.30 ar ddydd Gwener.