We bought a property a couple of years ago which we let out. My tenant contacted me recently to say the neighbour had been round to say that the fence between the 2 properties was swaying in the recent bad weather and that it needed to be repaired. I called round to the house today to look at it, and the fence is fully within the neighbour's property. The posts are definitely within their property line, with the panel further in, facing their side (diagram attached). There is one post that is loose, the other 2 are sound.
I called round to speak to the neighbours and I explained that the fence belonged fully to them as it was within their property and it was therefore their responsibility to maintain but I would be more than happy to facilitate access.
It is fair to say that they were a fairly excitable couple, and the wife was quite irate, saying that she would not be paying to fix it. They said that a number of years ago the previous owner of our house had replaced a post when it was loose. I said he may well have done out of goodwill, but as far as I was concerned the fence was fully on their property and therefore not my responsibility. I invited them round to our house so that they could see the posts are definitely on their property with the fence panels even further in again. Their house extends further back than ours, and we have a path running down the side, in line with the edge of their wall (hard to explain, but hopefully the diagram will explain).
I haven't had a chance to look at land registry, but I have looked on the garden law forum which talks about H marks and T marks, however surely that would only apply to fences that straddle the boundary?
Can anyone help me to understand this? If it is relevant, we are in NI.