Items 4 - 5 to be completed between 15th October and January 31st and is subject to the completion of a second phase of felling scheduled for the end of September.
Mae pob un o'r tri digid nesaf yn sefydlu mwy o fanylder o fewn y categori perthnasol, tra bod y nawfed a'r digid terfynol yn gwirio'r digidau blaenorol