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This one I wasn't sure about: larus canus, surely yellow legs? However, A look at the RSPB's on line identifier (often worth a couple of clicks for a reliable check) shows a 1st. winter Common Gull like this one. One further thought- surely this gull is mis-named. At least 3 larid species are more common in most of Britain.
Lat/Lng: 51.863339175395, 0.83163505222319
OS grid ref: TL950220
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