Do you have access to free legal advice on your house insurance? It's well worth considering contacting them for advice, as I did when I had a boundary dispute with my nextdoor neighbour.
If they have intruded, they'll probably advise you to send a registered letter asking them to put it back to the way it is, and suggest mediation to resolve it, if they challenge your claim, and give them 14 days to respond. If they don't respond, send a reminder letter. If they don't respond to that, then send a letter before action, giving them copies of your evidence: like before and after pictures and anything relevant on your title deeds. Keep a diary of any incidents and who and what was said on the phone, etc. If you go to the CAB, ask for a copy of the notes from the advisers, daysheets, etc. If they ignore your letter before action, then they've broken the preaction protocols, which the courts look down on.
Obliviously, if you can avoid court action, all the better, as neighbour disputes can end up very expensive and time consuming to resolve, but if you don't, you've got to prove that you exhausted all avenues not to bring it to court. As this will put you in a favourable position with the courts. |