Butline- This is not true at all, the policy is that when you get the call and BA offer you employment you can turn it down. If this is the case you then remain in the holding pool for future offers. Beware though that this is conditional on everyone else in the holding pool being offered employment first before they give you a second bite at the cherry. No so bad if the holding pool is only a dozen pilots or so your turn will come around again soon enough. If there are alot though it could be a long wait and at the end of it you may get offered something worse the second time. Only bit of advise I was given is that senority is everything at BA so join as soon as possible.