https://www.naturalresourceswales.gov.uk/permits-and-permissions/using-land-we-manage/check-if-you-are-allowed-to-use-land-we-manage/?lang=cy
Cyfoeth Naturiol Cymru / Gwiriwch a oes gennych hawl i ddefnyddio tir yr ydym yn ei reoli
Use this service to check if you are allowed to do something on land we manage
cyfoethnaturiolcymruoesgennych