- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°12'19"N 5°33'20"W
- Eastings/Northings: 146383, 39970
- OS Grid: SW463399
- Mapcode Local: GBR DXN4.J0F
- Mapcode Global: VH053.N39G
Location and coordinates are for the approximate centre of Trilley Rock within this administrative area.
Geographic features and populated places may cross administrative borders.