If I understand it correctly the current industrial action has now ended .. without resolution.
Further industrial action can only take place after annother vote/ballot (on a seperate issue if, as I understand the various posts, dispute protection is to exist) when authorised by Unite - as made very clear by the recent missive from Unite on the blinds.
Not quite. The original ballot for IA is still good and UNITE can allow further strikes without any new ballot. The problem with this is that the protected period of 12 weeks IA is now over. This means that strikers could be sacked for breach of contract and it would not automatically be deemed to be unfair dismissal.
A new ballot would have to be over entirely new issues for there to be a new protected period, which presents BASSA and UNITE some difficulties as they clearly linked ST and Disciplinary issues in with the earlier period of IA.
The window blinds issue is illegal IA as this has not been balloted upon. BA would be within their rights as an employer to summarily dismiss anyone taking this unofficial wildcat action.