node measurement: 
Eton Wick, Bell Lane, Common Brook-27-09-2021-19
Pollution from inflow pipes or from the immediate surroundings: 
Source is Thames Water treatment works so always "rich" in P and N
Water entering the waterbody from another source: 
Road run-off
Recent changes to the surrounding land use (e.g. a building development next to the waterbody): 
Recent high rains or local flooding events: