So we moved into our smallholding about 18 months ago. It had been left to rack and ruin a bit and at first the horses got out of their field a few times but were always still on our property. We paid someone to stock fence the field properly but there is one fence line that borders our neighbour's forks whuch is not our fence line, it is his, so we didn't pay to fence that as there was a hedge there. December 2016 they broke through the hedge into the neighbour's field which was basically scrub with no crop or livestock... So we put up electric fencing. This worked perfectly thoroughout 2017. My neighbour had said after the horses recalled in December that not too worry he'd be putting a proper fence up in summer 2017. He removed the hedge but ran out of money and didn't fence the field.
Fast forward to January 2018 when we had those awful storms and 80mph winds which blew the electric fence down and the horses got out again for about 30 minutes. We put the electric fencing back up and since then no issues with escaping. He's now threatening us with "legal action" if they escape again onto his land.
I know we are liable for any damage caused (He's not asking for money he just hates us and hates horses) whuch is fine but I'm not sure what legal action he could take if any? We've fenced the field effectively and in those winds people died and lost their roofed etc so my electric fence stood no chance.