These gulls seem to be showing signs of switching to their summer colours.
Bit of a dull day most of the time.
No interactions present.
Lat/Lng: 52.29034, -0.33091
OS grid ref: TL139671
Water level is very low. I understand that in periods of heavy rain incoming water is diverted because it's full of silt. It's hard (and expensive) to dredge a reservoir.