For travelers to London, a new helicopter shuttle service now provides transportation between the international Biggin Hill Airport—a popular destination for private and corporate jets—and the center of the city, about 12 miles away. The Heli Shuttle, operated by Castle Air, takes just 6 minutes, compared to an hour or so by road. Service is available to the London Heliport on the Thames opposite Chelsea Harbor—best for accessing central London, Kensington, Chelsea, and Mayfair—or to the Vanguard Helipad on th…