- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°51'17"N 3°38'45"W
- Eastings/Northings: 286746, 218659
- OS Grid: SN867186
- Mapcode Local: GBR YB.TB9G
- Mapcode Global: VH5FR.RMGT
Location and coordinates are for the approximate centre of Cwm Nant Lloi within this administrative area.
Geographic features and populated places may cross administrative borders.