Beagle and others. Please wait until the press release by BALPA tomorrow (Monday), until then you will only get bits of the story. In answer to your question though, yes, the pilot's representatives have been working with the company for several months now, but there seems to be little understanding of their grievances.
Unwiseowl. I believe that BALPA may ask other companies not to "strike-break". You are right that secondary action is illegal, but in my understanding this means you cannot drag your company into the dispute and refuse to work normally. However I believe that refusing to take action that will undermine an official strike, providing your union has approved it, is not illegal. I suspect BALPA will inform all companies concerned if it should come to this; there is still hope at the ACAS meeting tomorrow.
Aerobat. There was no vote on a split, and pilots did not vote in favour.