Come September, the venerable British Airways will inaugurate a new, all-business service from New York to London City Airport. (That's the airstrip favored by the private-jet crowd because it's only about seven miles east of downtown, not 45 minutes in the limo from Heathrow.) The new service is plenty nice, using Airbus A318s that will feature cuisine developed at London's acclaimed Roast restaurant. But it's a small detail in the press release that makes us slightly nostalgic. The jets will use flight numbers BA001 and BA004—designations once assigned to the Concorde.