Usually expect these from a far flung pic to be Herring Gull - not this time.
No interactions present.
.and a common gull 10th (or thereabouts) from the right.
....a solitary Herring Gull - normally my distal pics are just these boys. Not convinced about any common Gull though.
if you come in from the right hand side of the flock there is a gap and then a blackhead sat. To the left of that is a standing bh, left of that and in the foreground is a stockier bird with a darker mantle, its subtle, but it is a common gull.
Lat/Lng: 51.3814, 1.3139
OS grid ref: TR306699