I set up this site in 2006 partly to help me keep track of local street issues after years of work with neighbours and local public services to help clean the neighbourhood up. I did a walk on Saturday around the North bit of Kings Cross and reported the usual haul of grafitti tags and snapped off trees. Why not have a go yourself? It's good exercise and helps keep the neighbourhood clean. If you ae lucky enough to have a modern phone you can take pics and email them as you go to contact@islington.gov.uk
Kings Cross Environment 
If you see a damaged tree, or one whose stake has been damaged so it could be at risk, please report it asap to Islington’s urban forest manager, James Chambers. That’s james.chambers@islington.gov.uk. He once got a tree on the Cally restaked within two hours of my reporting it!
And if you happen to see a tree being knocked over by a careless driver, try to get their reg no and tell James–he can get them prosecuted and fined, which helps pay to replace the tree. Every sapling knocked over costs us £700 to replace.