I have a leylandii hedge at the bottom of my garden it was a source of some dispute between the people who used to live in my property and the owners of the leylandii , since the owners of the said leylandii did not do any thing regarding trimming i took it upon myself to keep it trimmed , armed with some long branch loppers i would trim all the leaders out thus keeping hedge within a limit of common sense but my neighbour caught me last week doing my regular trim and immediatley went on the attack, i keeping my calm pointed out to her that the law states that the max height for these hedges is 6foot 6 inches and that she nor i wanted that height and that all i wanted to avoid was the hedge getting out of control so it would cost her money to have it trimmed, after i had been scolded for not asking her permission to carry out the trim she gave her permission to carry on, i might add that all the trimmings were in my garden and desposed of by me