This tree’s not going anywhere.

On a grey day, on a suburban street corner, a high brick wall runs along the boundary. The bricks are painted dull ochre, with crumbling patches of cream cement render over the top. A riot of vegetation springs up behind the wall, and on the footpath in front of it stands a tree, hemmed in by a barrier of very short, very thick brown posts with square aluminium caps. A metal tube runs through all the posts. The barrier appears to have been built to keep the tree in.