Julie Montagu is a yoga and nutrition teacher at London's top studios, star of the recent US Bravo show Ladies of London, the brains behind the new online nutrition course the Flexi Foodie Academy, and creator of her own range of energy snacks. Married with four children, she is surely one of only very few people whose natural body clock and zest for life habitually propel her out of bed after just six hours of sleep. www.juliemontagu.com