For information about surveys conducted by the Welsh Government and for advice about conducting surveys or the survey approval process, please contact surveysadvice@gov.wales.
I gael gwybodaeth am yr arolygon a gynhaliwyd gan Lywodraeth Cymru ac i gael cyngor am gynnal arolygon neu’r broses gymeradwyo, cysylltwch â cyngor-arolygon@llyw.cymru.