- Category: Landcover
- Type: Forest or Wood
- Latitude/Longitude: 51°57'4"N 4°14'56"W
- Eastings/Northings: 245545, 230465
- OS Grid: SN455304
- Mapcode Local: GBR DJ.MBQ6
- Mapcode Global: VH3L4.97M1
Location and coordinates are for the approximate centre of Allt Derlwyn within this administrative area.
Geographic features and populated places may cross administrative borders.