- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°48'6"N 4°42'27"W
- Eastings/Northings: 217562, 326138
- OS Grid: SH175261
- Mapcode Local: GBR GPR9.2BQ
- Mapcode Global: WH33M.NTFW
Location and coordinates are for the approximate centre of Carreg Llmrïaid within this administrative area.
Geographic features and populated places may cross administrative borders.