The names Harry Pitman, Andre Salmon, Elianne Andam and Victor Lee might not mean much to you because we seem to have become immune to the way they all lost their lives.
They were aged 16, 18, 15 and 17 when they fell victim to knife crime and though Wednesday - World Children's Day - gives cause to assess once again how this scourge might be purged from our society, it feels like we've been here 100 times before.
It's often the mothers and sisters and aunts of a neighbourhood who lead the war against this threat to our children's safety.