 My mum's got this friend called Helen. They met at Scottish Country Dancing. Helen was born in China, but for the past 30 years she's been living in Britain. She works as an accountant. Helen knows I'm a journalist, and one day recently she got in touch. She said she had a story she needed to tell me about something that happened to her last August. I was in bed, I heard a phone call, I thought it was my mum, because she's the only person who called me at 8 o'clock in the morning on Sunday. But it wasn't her mum.