They are well aware of it at the car hire place. I walked past the premises last year whilst they were having it looked at. The whole plot is infested, with weed coming up betwee steps and through the concrete pavement. I feel for the flats next door! I think the problem with it is that it all but disappears for many months of the year, so as it goes out of sight, its out of mind. They try to contain it by trapping the weed between two wire fences, but that will not restrict the undergrowth creeping next door.