BBC - Action Network - How to deal with nuisance neighbours
This link might be useful to you.
I have lived in eleven different houses. I know what torment bad neighbours can be. On my last move I sold my (owned) terraced house because I had bad neighbours on both sides. I was so desperate to move that I sold it for much less than its value, but could do that because I had been offered a council tenancy on medical grounds.
I have 'let lucky' and now live where the SILENCE took some getting used to. -it is really wonderful to have peace and quiet. Now that I have found how wonderful that is I would fight tooth and nail to keep it this way.