What comes out of the nose often grosses out first-timers, but users say the relief outweighs the revulsion, and they get used to it.

CNN: Why people swear by the neti pot

The airlines are not prepared to say what fares they will charge, but the 3, 500 regular Concorde users (many of whom fly back first class on subsonic flights after a day's work in America or Europe) are unlikely to be price-sensitive.

ECONOMIST: Any day now the supersonic jet will be cleared for take-off