The rules of success are being rewritten by a new generation of British talent. The Grammy-winning musician Raye, 28, has reclaimed her musical independence to become a global powerhouse. The cricket prodigy Jacob Bethell, 22, is shattering the myth that you need to have a long international career before you captain your country. And the farmer Harriet Cowan, 25, is modernising the industry’s image — and keeping 65-year-old Jeremy Clarkson in check. For this year’s 30 under 30 list we consulted editors from across The Sunday Times — experts in politics, business, sport, entertainment, the arts, beauty, fashion and food....