Back of the house is south facing. Garden approx. 8m. width and 8m. length. At the bottom of the garden approx. 2m. from boundary fence there is a weeping willow tree that has grown approx. 9m.tall and 10m.wide. and is starting to block out a considerable ammount of light from the garden. I actually like the tree but not its monstrous size. Have read all the info. at internet site Garden Law and searched back posts on here. But can anyone tell me at what point/height this can be classed as "illegal/causing nuisance". The owners of the tree have a "management company" who are dragging there heels over doing something about it, despite requests for it to be pollarded professionally. A local councillor has been involved to no avail. Any suggestions.