Not too big a surprise as Bonaparte's Gull has been pretty much annual on the Exe for years. Nice to see though, especially since the famous long stayer failed to reappear this winter. I picked this bird up around 0630, with a feeding Black-headed Gull flock off Shelly Beach. Photographing it was a nightmare as it was a long way off and only alighting on the water for seconds. A couple first-summer Mediterranean Gulls and a first-summer Common Gull were also in the flock, and off Mudbank - 6 Brent Geese (at least five of which were Pale-bellied) and 5 Great Crested Grebe.
Earlier - off Maer Rocks - 1 Common Tern, 1 fs Mediterranean Gull and a Great Northern Diver.
I've been lucky enough to find four of these now. I doubt it'll be too long before the BBRC stop assessing them.