- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'10"N 4°57'17"W
- Eastings/Northings: 197277, 237962
- OS Grid: SM972379
- Mapcode Local: GBR CL.HX8W
- Mapcode Global: VH1QG.2XFC
Location and coordinates are for the approximate centre of Y Das within this administrative area.
Geographic features and populated places may cross administrative borders.