I believe ACAS involvement was actually agreed at the meeting at which Simpson was gleefully twittering. Until, that is, BASSA got it cancelled.
Or, as Woodley put it at the time: "'We made some good progress with regards to discipline of our members, with the introduction of Acas into the disciplinary process that is right in the direction. We have already made it clear that we have got an agreement on the business issues in principle.''
At this time, the return of staff travel seemed to be the key issue. That was probably Unite's priority.
BASSA are now trying to make disciplinaries the priority.
It's not exactly been unusual for them to screw things up, is it?