Posted: 25/07/2014 at 23:16
One question: Who paid for the new fence? You? Or did you go half with the neighbours? If the fence belongs to you, then you have every right to control what grows on it! Your neighbours , if they did not offer to go half, have no rights at all wrt the fence boundary. If you ask the council to enter the debate, they will do so but it will cost you £300 ( North Tyneside council charge this for such neighbour disputes).
I would write to the neighbours concerned , stating that since you own the fence ie you paid for it, ( I assume they did not offer to go half), and that they do not intend to do anything about the weeds growing through it, you intend to take appropriate action.
They will soon contact you if they are bothered. If you do not get a reply within a week, apply Deep Rooter Round Up spray, to the plant on your side and leave for a week. - that should do the trick.
If they come back and complain to the council, they council will ask them for the £300 to proceed before they prosecute.. - they won't pay that.