Flat Holm (Ynys Echni)
| Location | ST 22241 64663 / 51.3757, -3.1186 / decking.youths.eagle |
| Established / Rebuilt / Automated / Closed | 1737 / 1820, 1866 / 1988 / — |
| Architect or Builder | |
| Height of tower (m) / above sea level (m) / Range (NM) | 30 / 50 / 15 |
| Character | Fl(3) WR 10s |
| Optic | LED, within 1st order fixed catadioptric |
| Owner | Trinity House |
One of the oldest lighthouse sites in Wales, preceded just by St Ann’s Head and the Skerries, this light marks a low-lying island in the middle of the Bristol Channel. The main tower is essentially the original 1737 structure, which was topped by a coal brazier, but it has been increased in height twice as the lighting system has been upgraded. The island, now a nature reserve, also has a wealth of other sites of historic interest and the most southerly pub in Wales, the tiny Gull and Leek.