I have great sympathy. I used to live in Devonshire and recall a simalar disturbance last year.
So there is nothing in the law we can do if the noise does not happen in working hours. This is an absolute disgrace. There are many instances where people at the end of their tether take the law into their own hands. Then of course the police rush round.
There used to people you could call 24/7 to monitor noise , what the dickens has happened to them .