Posted: 20/09/2016 at 16:34
Do they do things in their garden Sit, play, garden?
I take it you have tried friendly answers to explain that your shrubs and trees are perfectly legal, perfectly reasonable and destined to stay?
What is the boundary between you? A fence, a wall?
Do your deeds have any covenants about boundaries, hedges, shrubs and trees?
If not, the easy answer may be to erect a standard 1.8m high fence using larch panels or trellis just inside the line on your side so you get your privacy and they can't complain about exceeding accepted rules about boundaries.