'I saw a group of children huddled together. They were all dead': Kids shot trying to escape, teacher executed as she protected her students... 30 years on from Dunblane, the question that still torments survivors and the bereaved

At the sound of the first shots, Eileen Harrild, a PE teacher, turned toward the door. She was surrounded by a group of excited five-year-olds in white T-shirts and shorts about to start the first class of the day.