- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°13'1"N 5°28'27"W
- Eastings/Northings: 152250, 41020
- OS Grid: SW522410
- Mapcode Local: GBR DXV3.K87
- Mapcode Global: VH12F.2SBW
Location and coordinates are for the approximate centre of Merryn within this administrative area.
Geographic features and populated places may cross administrative borders.