- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'28"N 6°21'40"W
- Eastings/Northings: 87302, 15519
- OS Grid: SV873155
- Mapcode Local: GBR BXPS.M0N
- Mapcode Global: VGYBX.PBC6
Location and coordinates are for the approximate centre of Great High Rock within this administrative area.
Geographic features and populated places may cross administrative borders.