During a family holiday in 1996, my mum noticed something wasn’t quite right with my back. Sunbathing by the pool, she saw a flap of skin that looked out of place. When we got home, Dad’s osteopath traced an S-shape with her finger along my spine, and suggested I see a faith healer. Mum insisted on a more traditional route, and at the Royal National Orthopaedic hospital in Harrow, west London, I...