- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°7'17"N 3°45'41"W
- Eastings/Northings: 279500, 248500
- OS Grid: SN795485
- Mapcode Local: GBR Y5.8KM6
- Mapcode Global: VH5DB.RXBX
Location and coordinates are for the approximate centre of Llyn Brianne within this administrative area.
Geographic features and populated places may cross administrative borders.