Personally Litebulbs I was quite heartened by the Unite memo which seemed to me to spell out the situation succinctly to their members, and thus protecting them from possible sanction.
Whether their advice that failure to close the blinds may be classed as unprotected IA is correct or not is unclear but sounds plausible to an employment-law numpty like me.
If you think otherwise, what would you say were Unite's motives in the memo? Seems to me that they could only be to either protect their members (as they should) or to give BASSA a bloody nose.