The scheduled monument consent process is intended to protect the monument, its setting and its features from unsympathetic works that could damage its national importance.
Bwriedir i'r broses caniatâd heneb gofrestredig ddiogelu'r heneb, ei lleoliad a'i nodweddion rhag gwaith anghydnaws a allai niweidio ei phwysigrwydd cenedlaethol.