The Minister for Environment, Energy and Rural Affairs has declined to authorise a time extension issued by the Coal Authority to Celtic Energy allowing coal extraction at the Nant Helen coal site.
Mae Gweinidog yr Amgylchedd, Ynni a Materion Gwledig wedi gwrthod awdurdodi estyniad amser a gyhoeddwyd gan yr Awdurdod Glo i Celtic Energy er mwyn caniatáu cloddio am lo yn safle Nant Helen.