https://www.naturalresourceswales.gov.uk/permits-and-permissions/waste-permitting/denaturing-of-controlled-drugs-at-a-place-other-than-the-production-premises/?lang=cy
Cyfoeth Naturiol Cymru / Datganiad rheoleiddio 094: Dadnatureiddio cyffuriau rheoledig mewn man...
cymrurheoleiddio