There's a buzz around London, in no small part due to the Chunnel, which has made Europe a much smaller place. The U.K.'s burgeoning economy, back on track after several years in a downturn, has enticed even French 20-somethings to traverse the tunnel between France and England for a crack at better jobs. London's brilliant fashion reputation is finally complemented by a terrific one for food, not unlike New York's, where hip restaurants reign and chefs are celebrities. Among some of the trendiest restaurants: Oxo, Quaglino's, and Mezzo's.