You’re probably already keeping a detailed log of every incident, and recording evidence - keep doing it

Go to the local council environmental nuisance team

They provide a noise meter (or sometimes app for your phone) to record proof

After a few incidents they can serve him with a noise abatement order

If for some reason they won’t, as long as you’ve followed the process above you can apply to Magistrate’s Court directly for a noise abatement order and both parties will get summoned to put forward their sides.