Posted: 02/01/2015 at 13:57
If you get on with the neighbours just let them know that you are going to cut it back to the boundary and ask if their gardener would be able to dispose of the prunings as you have no car.
The hedge between ourselves and our neighbour became unmanageable and was bald in the middle where its own weight, and winter snow, had pulled it apart. We removed the entire thing and each regained over a metre of garden width. Result!