My neighbours have a cypress leylandii boundary hedge which is overgrown and restricts the usable area for parking my car. I have asked them to maintain the hedge; what more can I do?
You can ask the council to intervene where a neighbour’s evergreen or semi evergreen hedge interferes with the “reasonable enjoyment of your home and garden”. But this would cost you money and you have to be able to show that you have made an attempt to resolve the problem with your neighbour. Ask the neighbour if you can reduce the hedge to two metres in height. Either way you are entitled to cut it back to the boundary as long as you offer to return the branches since they belong to your neighbour.