TIA for any help on this. My dad owns a Victorian property which had a house on the adjoining plot built some time in the 30's. From cobbled together history we think this used to be a grazing area for farm horses, possibly connected to our family. However at some point the land was sold and this new house built. The owner died 5+years ago and the house was sold. The couple who bought it began by chopping every tree down (in an environmental area - no idea how they got away with that) and knocking the old house down. They are now building in Victorian style.
Prior to the works being carried out they mentioned to my father that the wall between the two properties was listing slightly. He agreed to part fund the frontage where at the time it was most obvious. They then came after him, once the house was underway for money for the remainder of the wall and inadvertently sent him a copy of their surveyor's email suggesting brackets be used on their side to support the wall, as the foundations of their new property were close to it and could disrupt it further.
They are now asking for 14k for the wall to be fixed stating it is dangerous. The title deeds do not show who's ownership this wall falls under - there are no T marks or red lines.
As they have decided to build (nearly completed) so close to the wall with advance knowledge of this issue, surely they have to be responsible for the wall they have disrupted? My dad has a surveyor badgering him at the moment but we are suspicious of them for multiple reasons (the new owners, not the surveyor) as he appears to have links with the council...
Any help gratefully received!