The research design must justify why the excavation is necessary and aim to minimise the scale of disturbance taking account of advice in Conservation Principles.
Rhaid i ddyluniad yr ymchwil esbonio pam mae angen cloddio’r heneb a cheisio cadw’r aflonyddu mor fach â phosibl, gan ddilyn cyngor yr Egwyddorion Cadwraeth.