If it is a problem, I would add two feet of something similar to tennis net, making it an 8 foot barrier, without presenting a horror to the neighbours view.
Or, you could do similar, using that cattle fence type stuff. 8 feet is too high to fly over, no way a chicken is going to launch and fly...
Some pics of my lead hen. Eats straight out of my hand and has learned that I not only know where the best bugs are, but can move stuff like logs, so she can get to them. Eggsellent layer. I’m pretty clueless on breeds, but I think she has at least a fair bit of Plymouth Rock in her.
I wanted two pullets that a local guy had and he insisted he wanted to include two of these in the deal, so I went with it. She is around six months old now in these pics.
This is why I decided to go the open plan route on my setup. A secure run/coop, that is really just a big steel cage with a roof on it and place to roost that is sheltered from direct wind for stormy nights.
Just out of unrelated curiosity, what has winter been like that side, this year? I ask, because ours has been wildly warm. July to September are usually our coldest months and we have had temps as high as 31 degrees.
I think you will do well with the Potch birds. Hard to beat something that is bred locally, for local conditions. If you get birds bred in the middle of the UK, it is like getting a husky for a pet, when a Boerboel would make more sense.