- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°21'28"N 2°59'58"W
- Eastings/Northings: 330495, 162567
- OS Grid: ST304625
- Mapcode Local: GBR J5.TQ65
- Mapcode Global: VH7CJ.Y4LC
Location and coordinates are for the approximate centre of Birnbeck Island within this administrative area.
Geographic features and populated places may cross administrative borders.