The bmiCC have not to the best of my knowledge not even mentioned zipping of the seniority lists. From the outset they where offered a deal(!) that would have been impossible to recommend to their membership without at least exploring their options with their future employers. Events have subsequently become even more complicated by the threat of lay off.
It would indeed be a very difficult sell to their colleagues if they do not engage with the future employers. The constant harping on about them overplaying their hand is unjustified. Infact it would be more accurate to say their hand have been tied behind their back so far!
To insinuate that the bmiCC's actions have resulted in the threat of lay off's is, quite frankly, scurrilous.