Hi... apologies for being vague above, have been running around.
FYI, I called the council's 020 7525 2000 complaints line and logged the issue with them. They can't deal with it directly, but they can pass it on to the Parks team.
A quicker way to report it directly is to email:-
The more people who log complaints will help to speed up the response, so if you contact Parks in addition to my log at the 2000 number, then that's two of us!
The above email address is also the best way to report dog poo in Goose Green, as discussed on a previous thread. Goose Green is inspected regularly, but sometimes issues are missed unless the locations are specifically logged.
Let me know what happens!