- Category: Landcover
- Type: Forest or Wood
- Latitude/Longitude: 51°56'43"N 4°13'38"W
- Eastings/Northings: 247007, 229764
- OS Grid: SN470297
- Mapcode Local: GBR DK.MQ2D
- Mapcode Global: VH3L4.PC0L
Location and coordinates are for the approximate centre of Allt y Dderwen within this administrative area.
Geographic features and populated places may cross administrative borders.