- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°13'6"N 5°28'50"W
- Eastings/Northings: 151798, 41190
- OS Grid: SW517411
- Mapcode Local: GBR DXV3.8BY
- Mapcode Global: VH12D.YRFW
Location and coordinates are for the approximate centre of Three Brothers within this administrative area.
Geographic features and populated places may cross administrative borders.