The current survey does not ask for personal details such as your name, address and telephone number, however you are asked for your email address to take part in the prize draw.
Nid yw'r arolwg presennol yn gofyn am fanylion personol fel eich enw, eich cyfeiriad a’ch rhif ffôn, ond gofynnir am eich cyfeiriad e-bost er mwyn cymryd rhan yn y raffl.