Having spent around £4,000 having the fence to the right of us and across the end of he garden refenced we are having problems with our neighbours on the other side not maintaining their fence.
The fence is the responsibility of their propery and was there before they moved it, its 6ft panel fencing, but very badly put together and basically falling to bits. One panel in particular keeps falling into our garden (snapping my blooming washing line every single time 
) every time there is anything stronger than a mild gust of wind. Dh has tried to fix it himself on several occasions, but there's basically nothing to attach it to, as the whole fenceline is falling apart. We have forked out for planks of wood and concrete post set a few times and managed to keep it together for a little while, but as soon as we get some strong winds, over it goes again.
We have two dogs and if we don't see that the panel is down before we let them out - or it comes down when they are in the garden, they can get out onto our road - which is a busy main road. Our lurcher doesn't tend to leave the neighbours garden, but our old lady dog just bolts. This has happened several times now and on two of those occasions we were lucky that someone found her and took her in, after passing her details to the dog-warden, so we got her back.
I have literally just had the latest incident about an hour ago when the blooming panel blew down just as the dogs headed out into the garden. I saw my old girl shoot through the panel, and ran outside, realised their side gate was also open and ran out the front just in time to see her heading at speed for the traffic, fortunately a bus shot past and she turned and ran towards the park instead. She is getting pretty deaf and didn't even seem to realise I was behind calling her (she used to have a bombproof recall but her hearing is affecting this these days). Cue me running around in my joggers, tshirt and .... ahem .... crocs in the park in the wind and sleet, leaving my three dcs at home alone. I caught her and brought her home, but am still shaking - not to mention furious.
Dh has spoken to our neighbour (who ironically is a builder) about it on several occasions and he's always all nice and smiley about it - 'yeah fine, ok I'll get it fixed' kind of thing, but this has been going on for a couple of years now and after this afternoon's experience I've had enough. I have asked dh to go round and have it out with him - but, well dh isn't good with confrontation at the best of time. An additional problem is that they never answer their front door, even if you can see them in the front room, they just ignore it.
I have just typed of a quick letter to him, sharp but not rude or insulting, pointing out that he owns the fenceline, what the problem is and that I want him to fix it asap. Is there anything I could can do to 'force/make' him fix the fence or is it a case of it being his property - so up to him whether or not he wants to maintain it?