It is now very clear that the 'show of hands meeting at an undisclosed venue' announcement is a spurious and unsanctioned release by some split faction within Unite's Branch(es) as it is completely in bad faith. It's a more aggregious version of the DS tweeting content while negotiating episode.
This whole round of negotiations was entered into in good faith with a joint and mutually-agreed statement between BA & Unite and would never be concluded with such a random and potentially scuppering release.
My guess is that BA will now have stepped-back to respectfully allow time for the Union to 'sort-out' its wayward Branch(es) and to come back with a retraction while the clock is still ticking.......
Love to be a fly on the wall!