the Tree Council (on treecouncil.org.uk) has also published detailed guidance on managing diseased ash trees which is aimed at local authorities and other public authorities
mae'r Cyngor Coed (artreecouncil.org.uk) hefyd wedi cyhoeddi canllawiau manwl ar reoli coed ynn heintiedig sydd wedi'u hanelu at awdurdodau lleol ac awdurdodau cyhoeddus eraill