I'm not sure on whether the gull is a Herring or COmmon Gull.
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The bill on the right-hand bird can be seen to be quite short and delicate, not very deep and with little 'hook' at the end. In contrast, Herring Gull has a longer beak, far deeper and with quite an obvious 'hook' at the tip. Common Gull often looks to have quite an open, cute face, too.
My Flickr photos...
Lat/Lng: 51.4056, -0.7666
OS grid ref: SU858681