- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 54°22'54"N 2°40'19"W
- Eastings/Northings: 356452, 498698
- OS Grid: SD564986
- Mapcode Local: GBR 9KSR.9Z
- Mapcode Global: WH82Q.X4S3
Location and coordinates are for the approximate centre of Flat Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.