- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°1'14"N 4°53'9"W
- Eastings/Northings: 202083, 239756
- OS Grid: SN020397
- Mapcode Local: GBR CP.GW5L
- Mapcode Global: VH1QH.8GCQ
Location and coordinates are for the approximate centre of Craig y Dyffryn within this administrative area.
Geographic features and populated places may cross administrative borders.