- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'19"N 5°12'21"W
- Eastings/Northings: 170144, 11057
- OS Grid: SW701110
- Mapcode Local: GBR Z5.8X7F
- Mapcode Global: VH13X.QD71
Location and coordinates are for the approximate centre of Pen Ervan within this administrative area.
Geographic features and populated places may cross administrative borders.