- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°18'2"N 4°41'29"W
- Eastings/Northings: 220747, 381575
- OS Grid: SH207815
- Mapcode Local: GBR GMSZ.9T2
- Mapcode Global: WH319.X95G
Location and coordinates are for the approximate centre of Pen-las Rock within this administrative area.
Geographic features and populated places may cross administrative borders.