Could all anglers be aware of giant hogweed growing on the riverbank; it isn't common but this non native plant is spreading.
It can be an irritant if touched and cause burns in severe cases if sap comes into contact with skin.
Download a fact sheet here and there is a plant app for smart phones.
If anglers find any plants can they report the location to KLAA directors whose numbers are in their books.
There has been some found on the banks of the relief channel between Downham and Denver.
Could anglers please keep away from this area until the EA remove it .