“Usually comforting notes when I was worried about exams or someone had been horrid at school.” Poppy stared into the distance. “She stayed the night before exams because we calmed each other’s nerves, but she couldn’t before our GCSEs – her dad wanted her home. I thought I was going to have a heart attack the first night, I was so wound up. But she knew how I slept and left me a note: ‘I’m always here’. I held that note all night and slept like a baby.”

