Great Laurence!
As I posted elsewhere, my elderly mother had new neighbours move in just three months ago. She has lived in her mid-terrace house for more than 60 years, and the house next door was sold to an Asian couple - not in itself a problem. Mum knew that work would have to be done on the house, which was done during the day, without too much noise. However, the day after the workmen moved out, the owner started his own repairs, and carried on hammering for two whole days until 6pm, when friends and relations arrived, and a 'party' that went on until after midnight. Mum knocked on the door at about 8pm on the second evening, and was treated with contempt. Near midnight, she called the Police, who spoke to the couple. It turned out to be the best thing she could have done. Two weeks later, the owners let the house to relatives, with two young children who constantly ran around the house (on laminated flooring), banged on radiators, and threw things at the wall at all times of day and night. Added to this, there were frequent noisy gatherings in the evenings.
Now, the problem is best part solved. As a result of Mum calling the Police, a community PO called to see her. In turn, the PO contacted the Environmental health Dept. The community PO spoke to the family, who apparently couldn't understand English. Not a problem - a letter was written to them in their own language. Although Mum was given the contact number for the EHD, the officer actually contacted her, as the PO had asked him to, and visited her. Mum had to fill in a report sheet of noise what and when but, before she sent it back, the EHO wrote a letter to the family. The noise levels improved somewhat but, interestingly, it was after Mum put a note through their door, asking for washing lines to be removed from HER fence, explaining at the same time how much their noise was affecting her health, that the situation improved radically.
So, first of all don't give up trying to sort out the problem. Being told by your council that "It's not our problem" or something similar, is highly unlikely to be true. If you are being kept awake at night, or your quality of life is seriously compromised, then you have a right to help and support from the local Environmental Health Dept. This is especially, but not only, so if you have young children who are being kept awake, or you are elderly, or suffer with serious health problems. If music or loud noise is going on late into the evening/night, check your local bye-laws - I would guess that in most residential areas, that level of noise isn't permitted. Start by talking to your neighbour(s) nicely, explaining the problem, and asking them to quieten down. If that doesn't work, or it doesn't last, then wrote a polite note. If that doesn't work, write another equally polite letter, informing them that, if they don't limit the noise, that you will, reluctantly, take further action. Again, if that doesn't work, then take said action. Unless the noise is exceptionally loud, and goes on until after midnight, then you can call the Police. Whatever, if the noise goes on, week after week, then make a written record of the details. When you contact the EHD you will probably have to fill in one of their own forms, but extra ammunition is never wasted. And again, DON'T GIVE UP!!!