Thank you for your reply. Do you have any advice for how to deal with the neighbours?
They have threatened small claims court although I would be surprised if they went ahead as their house is up for sale (it has been for a year now).
One of them is extremely unpleasant and confrontational and shouts abuse including bad language. I am concerned that a situation will occur infront of my son (I live on my own with him). I have already told them in writing (email) that I find their behaviour aggressive, upsetting and unnecessary. They replied saying that they think I am unnecessary. At what point does it become harassment?