We have never had any issues whatsoever with our next door neighbours. They've lived there probably since the late 90s.
Basically the majority of our kitchen wall is located in their back garden.
They've put a marquee tent in their yard about 10-20cms away from our kitchen wall. This has been there for a year and a half. Obviously the water run off has caused damp that's now seeped through our brickwork into our kitchen.
We've paid a damp specialist to do a report and showed it to the neighbours. It includes instruction to move the tent so it's at least a metre away from the wall and this would allow the damp to dry.
Unfortunately the neighbour accosted me while I was helping my disabled friend into my house so I was flustered and started saying the tent wasn't touching my wall, and that the overgrown plants on her yard came from my property. They don't. And if they did we'd be happy to cut them back as we regularly pay for gardening maintenance. So that threw me.
They never have done any gardening once except to borrow my loppers to make enough space to place this marquee tent. Which we assumed was temporary.
I'm now in a dispute with my mum who says I shouldn't contact the council about it. That she might contact a lawyer? But she doesn't even have a lawyer and the neighbours I doubt have money to be sued. Plus I'd hate to get into a dispute with them. Surely the council is more sensible as that's their landlord. After we've tried to explain and reason with them once more.
I don't want them to hate us but I really don't know what to do. Both of us are disabled and can't really handle conflict. But if she doesn't move her tent it's going to cause rising damp that could permanently wreck my home and the neighbours. We told her it could be affecting her house too but she was unbothered.