- Category: Landcover
- Type: Forest or Wood
- Latitude/Longitude: 51°56'7"N 3°50'53"W
- Eastings/Northings: 273034, 227948
- OS Grid: SN730279
- Mapcode Local: GBR Y2.N83J
- Mapcode Global: VH4HT.7MY3
Location and coordinates are for the approximate centre of Allt-Gerddi-duon within this administrative area.
Geographic features and populated places may cross administrative borders.