- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°13'19"N 4°10'29"W
- Eastings/Northings: 254905, 371661
- OS Grid: SH549716
- Mapcode Local: GBR 5N.10C0
- Mapcode Global: WH546.V86Q
Location and coordinates are for the approximate centre of Ynys Welltog within this administrative area.
Geographic features and populated places may cross administrative borders.