- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°57'46"N 4°29'8"W
- Eastings/Northings: 233145, 343521
- OS Grid: SH331435
- Mapcode Local: GBR 57.K8T3
- Mapcode Global: WH443.2S6C
Location and coordinates are for the approximate centre of Llech Lydan within this administrative area.
Geographic features and populated places may cross administrative borders.