New neighbours (rented) moved in above us a few months ago - I believe it is a family with a teenager and younger child. They have been noisier than previous tenants but bearable. Over the last week the teenager seems to have been left at home on their own and has been having numerous friends over, staying up til 3am and later - new year’s eve/day the noise went on til 5am, and it’s still going strong now at 3am. To be fair they are not playing music/it’s just banter but it’s just so loud and there’s a lot of banging/thuds. We have spoken to them twice but nothing has changed and I have now not been able to sleep for two nights in a row. I will be calling the landlord in the morning to complain but would I be unreasonable to report a breach of COVID regs (we’re in tier 4)? Don’t want to cause trouble (we have to live next to them after all) but with 2 young DC I need some sleep!!!