- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°1'18"N 4°52'17"W
- Eastings/Northings: 203078, 239829
- OS Grid: SN030398
- Mapcode Local: GBR CQ.GSCP
- Mapcode Global: VH1QH.HFZY
Location and coordinates are for the approximate centre of Cwm Dihaul within this administrative area.
Geographic features and populated places may cross administrative borders.