Still too early to say IMHO. Unite have till Friday of course, and delaying the announcement till then will prolong the dipute for the maximum possible time, to the benefit of certain senior BASSA members (but no-one else
).
I think that there will be an announcement either way on Friday. BASSA are seemingly desperate to strike regardless of both the dangers to their members and the utter pointlessness of it all, so my money is still on a strike announcement come Friday.