All responsible persons have been contacted to advise them of the need for intrusive surveys, and to arrange for permission to access the building to undertake this work.
Cysylltwyd â phob person cyfrifol i'w cynghori am yr angen am arolygon ymwthiol, ac i drefnu caniatâd i gael mynediad i'r adeiladau i ymgymryd â'r gwaith hwn.