// How can someone own something that is shared? //
easy English law takes this sort of thing into account
The rest of it is good advice - for gods sake do not get into a neighbour fence dispute.
https://www.thetimes.co.uk/article/trimming-a-neighbour-s-hedge-costs-couple-20k-87p7hj898
you are talking about plazzy netty stuff arent you ?
"and they choose not to speak to us. "
good - - - do the same
if you think they are trespassing get CCTV but really there isnt much money in it - liability for trespass with no damage
There is a 1997 act to cover this
but I cant remember the details - I think they have to give notice
honestly ignore it- much cheaper in the long run
( I know you are gonna say " this is DISGRACEFUL ! they are coming onto my property and treading the daisies and grass - and frightening the dogs if I had any etc etc )
I dont think you can cut your side of the plazzy off - I think it is part of the fence. Please dont tell us what happens unless your legal bills go above £30 000.