Not sure how true this is Mr Angry but I was told that the reason for not doing the trip within one FDP was because should the flight, in anyway be delayed and the crew go out of hours, there was no other Concord crew available until one positioned out from UK. This would be via other West Indies flights and local flights, (or a spare Concord direct! - way too expensive, even if they had a spare) and for Concord pax such a delay was considered unacceptable. May not be a word of truth in it!
