You should set out all your grounds of appeal clearly and concisely and focus upon the reasons your application meets the requirements and should not be the subject of a non-validation notice.
Dylech restru holl seiliau eich apêl yn glir ac yn gryno a chanolbwyntio ar y rhesymau pam fo eich cais yn bodloni’r gofynion ac na ddylai fod yn destun hysbysiad barnu’n annilys.