- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°41'43"N 5°17'23"W
- Eastings/Northings: 172741, 204736
- OS Grid: SM727047
- Mapcode Local: GBR G0.MBKZ
- Mapcode Global: VH0VC.8NB7
Location and coordinates are for the approximate centre of Head Rock within this administrative area.
Geographic features and populated places may cross administrative borders.