| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| Present | 2005 | Thames Estuary |
Seen all over the Thames Estuary, more smaller specimens than usual (<4inches). Exact location not pinpointed. | Paul Gilson |
| 2006-11-26 | All local beaches in the Pwllheli area, a large stranding of velella velella. |
Bernard Roberts |