where there is no other prescribed person to whom the disclosure should be made, the worker reasonably believes that the evidence will be concealed or destroyed if disclosed to his employer
Rhaid i’r aelod o’r pwyllgor trosolwg a chraffu sy’n cael gwybodaeth gyfrinachol neu esempt beidio â datgelu’r wybodaeth, oni bai ei fod wedi’i awdurdodi i wneud hynny o dan ryw ddeddfwriaeth arall.