Ummm..well it would be nice to think there is some "give" from a certain quarter but if you'll pardon me asking do you have a source for that?
I'm on e-mail Bulletin 33, timed at lunchtime today (GMM details) and also just had a look at another source and have seen no mention of that letter.
BALPA officials and reps are quite rightly playing cards very closely to the chest....