call100:
The offer you refer to was worse than the original offer, so there was no way it was going to work, BA knew that.
That's not quite right. The original offer which BA put forward was the one which Unite said they would ballot their members about, but that they could not recommend. This offer was dependent on strike dates not being called. It was the subsequent offer which Unite complained was "worse than the original offer".
That being said, I'm sure there's plenty of "facts" about which we will never get to know the truth.