Doctor on laptopLongevity is the buzzword of the moment, it seems; everyone from millionaires to the Vatican appears to be obsessed with learning the secrets of living longer. Still, while some of the advice is attention-grabbing, expert after expert seems to swear by the same basic rules. Eating well, getting enough high-quality sleep as possible, staying social, and exercising are all backed by research. So perhaps it’s not surprising that former Embarrassing Bodies host Dr Dawn Harper, an author, GP, and health and wellbeing ambassador for