Seen today on rising tide at about 15:30 at the Fremington Pill outfall was this Scaup Tufted hybrid keeping company with five Widgeon. Just down from the pill outfall were two pairs of Goosander. 

Two male and two female Goosander                      Scaup Tufted duck hybrid

Eds: Phil this looks to be a female (Greater) Scaup - certainly doesn't appear to be a hybrid.