- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°20'31"N 4°7'34"W
- Eastings/Northings: 255252, 273684
- OS Grid: SN552736
- Mapcode Local: GBR 8Q.TDPV
- Mapcode Global: VH4FQ.FDHD
Location and coordinates are for the approximate centre of Twr Gwylanod within this administrative area.
Geographic features and populated places may cross administrative borders.