
Update to this, as I forgot to reply before.
I can't afford to just build my own wall - I can't afford to do anything. I had to borrow money to pay for this one stretch of fence.
The dog has escaped several times since - the new bit of fence is up but within a week, he dug under the old mesh a foot along from the end of it. I'd put some metal poles in to try and stop him (I'd dug out a bramble root so softened the earth a bit), so he just dug through the grass next to them. No attempt again by next door to block the hole or do anything to prevent him doing it again, so I've buried some more mesh down into the hole to stop him.
The dog warden has now sent his letter, they should have had it yesterday or this morning (I got mine yesterday). I've just come home to let mine out to find their dog shut out and trying to dig under the fence where I buried the mesh. When he couldn't do that, he tried to push between the mesh and the fence where it overlaps. No sign of the neighbours, even after I shouted at the dog (and shouted his name so there was no mistaking who I was shouting at). I've now had to stack up a load of pallets that were going to be part of my dog yard fence to stop him pushing through, and pile old mesh and brambles along the clear stretch of fence (where I'd taken the brambles from, to allow the neighbours to get the new bit up) in a bid to stop him.
I don't know what else to do. They clearly don't give a cr@p about what he does or if he's hurt, and just before the new bit of fence went up, they told me that when he was staying with the bloke's mum, he was kept outside, she'd had to fortify a stable to stop him escaping, and when one of her dogs attacked him, he nearly killed it. They didn't tell me this before, only that he got attacked and didn't fight back. He won't start a fight but if that's how he'll finish one, it's got me scared to hell for my dogs' safety as two of them would go for him if they found him in the garden. I can check, but that doesn't mean he won't come through while we're out there - that's what he was trying to do today.
I need to ring Dog Law for legal advice but until then (not open at weekend) what else can I do? I do not want to have to wait until something happens between the dogs for action to be able to be taken, because that "something" could well result in serious injury to one of my dogs and certainly mental scarring, because both of the ones who would definitely go at him have pre-existing issues with dogs. And one other that is likely to at least get grumpy, has a slipped disc and other problems and even if he doesn't attack her, he is a serial humper and ruddy huge so he'll cause her severe pain at a minimum.