We have students living over the back of our garden and have to put up with noise during the early evening and long into the night quite regularly. A work colleague of my husband said that we should get a solicitor involved to nip it in the bud.
We don't know where the landlord lives or how to go about getting his address.
We are at the end of our tethers, DH gets very stressed and down about it. Its just so unpredictable and we don't want to live like this - wondering what sort of night we are going to get, especially with 2 DCs under 4.