If I remember correctly, after the failure of negotiations, before the first strikes at Easter WW mentioned something about a new policy regarding the union if agreement was not reached by the 14 June. It will be interesting to see if tomorrow brings any announcements.
I think its time to get this over with and issue new contracts to cc based on the last BA offer with an incentive (say maintaining seniority) if signed within 28 days. If it is not signed then an individual will be seen to have resigned after 90 days.
Regards