While I wish you the best of luck, I feel as if you’ve chosen a bit of a strange time to align yourselves with BA, given their recent (and very public) F-you attitude towards people travelling with instruments. As in, violinists, brass players, guitarists and so on no longer being allowed to store their instruments in overhead lockers or closets on BA aircraft, compounded with stories like
the string quartet whose instruments were lost by BA, then found and couriered to two incorrect addresses, and
the cellist who was denied boarding to the USA because BA refused to check in her cello because it didn’t have a visa to enter the US.
If this is your orchestra’s carrier of choice then, like I said, best of luck.