- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'42"N 4°55'27"W
- Eastings/Northings: 199405, 238859
- OS Grid: SM994388
- Mapcode Local: GBR CM.HK5N
- Mapcode Global: VH1QG.LPJM
Location and coordinates are for the approximate centre of Carreg Pen-las within this administrative area.
Geographic features and populated places may cross administrative borders.