If BA can prove that any new ballot about a different issue is intrinsicly link to the first ballot, then it is illegal and striking members can be dismissed. People who have been on strike before the 12 week deadline and then declare that they are no longer on strike after the 12 weeks are protected by law.
Have a browse at this.
Trade Union and Labour Relations (Consolidation) Act 1992 (c. 52)
It is sort of in plain English which is why I could understand it
