My DS (16) has a very good friend. His parents separated recently after a few years of difficulties related to alcohol/anger. I am not friends with the parents, but know them through DS’s activities etc. His mother has moved out to a very small rented flat 1 and a half hours away. DS and dad still live in the house. She has told her son to tell a neighbour or me if he feels worried about his dad’s behaviour. He is about to begin 6th form and wants to stay nearby to do that. I feel very unsettled about this and would value any advice. It is really none of my business but him being between school and college means that there is no point of contact at present.