When I first came across an Atkins Diet book, I was working in an office in south Wales. I had been working there for five or six years and had accumulated quite a bit of excess weight. I had never enjoyed participating in sport, but my previous job had been working on building sites, which entailed a certain amount of physical activity " just enough to keep me in reasonable shape. After five years as office-wallah, I weighed 18 stone 12 pounds (...