Thank you for your advice saveasteading.
I am no architect, but logically it makes sense the Neighbours rainwater should be disposed of in their own property in line with their approved extension plans which read (excluding dimensions/material references); Rainwater - provide gutters into rain water pipes as shown, into below ground drains terminating to soak aways 5m from any building, one to front and other to rear garden.
From what the Neighbour has said they did not install either of instructed soak aways at the time.
I am not confident or comfortable that an 80+ year old woman would have knowingly accepted responsibility for ALL of her Neighbours rainwater to come into her/now my property in the absence of any soak away at the time of build over 20 years ago. Duration should not be a consideration.
Yes, the gutters are continuous. During heavy rainfall it pours down the side of my building. I am fighting damp in my child’s bedroom located there - everything is kept away from the wall and I am continuously wiping condensation from the windows.
We have just had a new soak away installed in our back garden in line with the measurements of our to be extended
property. It is only after this Buildings Control have said we need to cap guttering from next door. Upon approaching the Neighbour about this, they threatened legal action if we do and said our soak away should take their water. Furthermore I can’t afford to now knowingly cause an obstruction.
Really appreciate your support! Just trying to make a better life for my family, and this Bully is making home life very stressful just in time for Christmas 😥