Single seam opportunities have been included as “challenging”, and would require a thorough appraisal to determine whether the nature of the workings would support a scheme.
Cynhwyswyd cyfleoedd un wythïen fel rhai “heriol”, a byddai angen eu harfarnu’n drylwyr i benderfynu a fyddai natur y gweithfeydd yn addas ar gyfer creu cynllun.