- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°0'19"N 4°7'35"W
- Eastings/Northings: 257404, 347466
- OS Grid: SH574474
- Mapcode Local: GBR 5Q.GL1P
- Mapcode Global: WH556.LQ58
Location and coordinates are for the approximate centre of Cwm Llwy within this administrative area.
Geographic features and populated places may cross administrative borders.