Another fly in the ointment regarding the sums 'Concorde to other BA flights' is the fact that people are coming from all over europe and arranging their travel plans via London or Paris for the sole purpose of flying on Concorde.
With no Concorde they'll go direct Frankfurt, Amsterdam, Stockholm, Copenhagen, Brussels and the connecting flights will also be lost.
If any-one can keep Concorde flying it'll be Branson.
Good Luck, Sir Richard.