| 1970 | An adult in summer plumage seen at Arlington Reservoir (ES) for 20 minutes on 4 July was the second British record (Rogers, M.J. 1972. Franklin's Gull in Sussex. British Birds 65:81-2). | * × |
| 1990 | An adult in winter plumage seen briefly at Brighton Marina (ES) on 29 December before drifting off west. | *91 × |
| 1991 | An adult in winter plumage, presumably the same, in fields near Newhaven Tidemills (ES) on 4 January. | *92 ×92 |