It must have aired maybe 15 years ago or so. Maybe not even that. It was like a fly on the wall documentary about social services child protection in England somewhere and followed social workers and families they helped. I remember one episode a pregnant addict left her violent boyfriend and she was doing really, really well until she took the baby to his and got drunk. I remember sobbing at it. Trying to tell DH about it but can’t remember the name of it. Pretty sure I haven’t made it up!