@Callimanco
@Rowan8
Yes, no doubt I’m the reason some of my many neighbours (across 3 properties) lose their tiny minds over not getting the exact fence they want. 
I’m clearly enormously uneighbourly and annoying when I hear out their plans, then calmly offer information like The Actual Law, and take the time to find quality tradespeople for them. I top off my vengeful attacks by rearranging my life around their construction schedule, offering to pay my share upfront, allowing extra access to my property for construction, and letting them have ‘the good side’ to maintain civil relations.
In return, I have been met with the most unbelievable arrogance, idiocy and criminal damage. Other nearby neighbours, legal professionals, tradespeople and even passers-by have been horrified at what’s gone on, I’m no longer surprised.
Feel blessed that you’ve had stress free fence negotiations, if you’ve had any at all. Trust me that fences often make people crazy. Even normally rational, nice people. And don’t get me started on nature’s assholes when they get excited about fencing. They can start a years-long campaign of nastiness over the tiniest perceived slight. Shooting themselves in the feet, and raining shrapnel around everyone nearby.
My favourite has to be the Earth-mother hippy (30’s) who told me that my boundary trees (far inside my rural property) had spoken to her, begging to be released from their 9 lowest branches so they could ‘breathe properly’ and better house fairies and elves. I kid you not.
So she waited for me to go on holiday, chain-sawed the branches (from my side), dumped them in my garden. 17 mature trees, branches of 20cm+ diameter. On the hottest day of the year (40º). Caused irreparable damage to the trees (no regrowth possible), wildlife, my garden and lost me a vital windbreak. Required a new fence to be built, at my expense, since she sold and moved away a month later. But, you know, the elves are apparently happier now so no harm done. 
Not in the UK, if that’s important. Sorry for the derail OP.