- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°42'13"N 3°13'20"W
- Eastings/Northings: 317500, 312500
- OS Grid: SJ175125
- Mapcode Local: GBR 9X.2M9M
- Mapcode Global: WH79G.G9RH
Location and coordinates are for the approximate centre of Llyn Du within this administrative area.
Geographic features and populated places may cross administrative borders.