To repeat my previous post for the avoidance of doubt:
As a note of correction to BASSA's solicitor, you most definitely can be sacked for taking part in a legal strike. It is correct to say that any dismissal would be illegal but there is no right to reinstatement and the level of compensation is limited.
Ask yourselves two questions and think carefully about the answers.
If BASSA's solicitors know that you can be sacked, why are they not telling you of this risk?
If BASSA's solicitors do not know that you can be sacked, how can you rely that any other legal advice they may give is accurate?