AengusOg, we thought the same at one point. We've tried speaking to him politely and in a very friendly manner, promised him we'd keep an eye on his escaping sheep, phone him if there were too many out for us to put. back, let him know of any signs of inteference with gates and fences, checked he was ok when we saw his quad bike half way in a fence, showed him where our electric fencing had been cut deiberately, so that he knew to keep a close eye on his fences and livestock incase whoever it was came back.
We discussed with him the possibility of having a key to his padlock and making sure that when we went in we locked the gate behind us and when we went back out we locked it again. His only objection was that the council wouldn't let him. This wasn't true.
The track is only useable by horses for about 10 weeks a year, if that, because it's reclaimed bog. We do not intend to damage the path, ride off the path, enter any of his fields or approach his farmyard. Last year, when we discovered part of the path was too soft we turned back straight away and let him know that that's what we had done so he was't worried about any damage. We even walked it with him to show him where we had turned back.
We have bent over backwards to keep things friendly, even after he confronted us last year then chased us with his tractor. He's been exactly the same with his neighbours, fencing across their gateways, digging ditches across them and breaking their field drains which has turned one corner of our field into a bog and generally being verbally abusive. Faced with this, I don't see how a discussion will help and tbh I don't know that I could do that after having my disability mocked by his wife and then her threats to inform the benefits people that I was riding a horse while claiming disaility benefit. I'm doing nothing wrong and threats to interfere with my private life have NOT gone down very well.
Some of the suggestions that you have all given me have been tried, to no avail, but other suggestions look promising. He has been given taxpayers' money to create this woodland on condition that the public can use it and he is reneging on that agreement. Either the condtions should be enforced or his grant sold be withdrawn in it's entirety. Additionally, one of the conditions attached to his planning consent for cofts is that he provide a hard-surfaced path (gravel) the length of the route. Last night we wandered up to another area which has the same conditions attached and in the space of 6 weeks a gravelled path has been created which is huge and goes through mature pine forest and over heathland. Horse friendly gates have been installed and it's magnificent. Our farmer has had years and done nothing.