Posted: 11/09/2014 at 19:58
Zoomer.......if your neighbour is unreasonable about the problem, you could try the Council but I imagine they will not be too worried unless you are in a council owned property.
Failing that, I would cut back all the growth on your side and then warn your neighbour that you will be using a safe weedkiller to stop any further encroachment. Whilst deliberating killing a neighbour's plant could be construed as criminal damage, there is nothing to stop you using weedkiller on your garden. After all, why would you know which roots were which
I'd be tempted to take photos as a backup should your neighbour decide to take issue with your actions. Looking on the bright side, if your neighbour is too lazy to sort the vine out, he will be too lazy to make much of a fuss.