- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'8"N 4°57'56"W
- Eastings/Northings: 196523, 237911
- OS Grid: SM965379
- Mapcode Local: GBR CL.J0XM
- Mapcode Global: VH1QF.WX5X
Location and coordinates are for the approximate centre of Carreg Tomas within this administrative area.
Geographic features and populated places may cross administrative borders.