sentences:  To ward off this potential threat, BCal's senior management decided to develop its own Concorde plans, either independently or in partnership with BA.The most obvious choice for a supersonic service was Gatwick—Lagos, the backbone and main money spinner of BCal's scheduled operation.BCal's Concorde task force's brief was to assess the viability of a second daily all-premium supersonic service complementing the airline's existing daily subsonic, mixed-class widebody service on this route.