- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'5"N 4°58'4"W
- Eastings/Northings: 196379, 237835
- OS Grid: SM963378
- Mapcode Local: GBR CL.J0FK
- Mapcode Global: VH1QF.VY2J
Location and coordinates are for the approximate centre of Carreg Coffin within this administrative area.
Geographic features and populated places may cross administrative borders.