The matters which determine the collective workload include (a) how many passengers are on board, (b) how the flight is configured and (c) what services are to be provided to the various categories of passengers. Factor (a) is outside the control of the parties. Factors (b) and (c) are matters for the decision of BA and are not dealt with in any provision of the WSA. Crew complements appear to have been agreed by reference to the anticipated or usual collective workload. If crew complements are reduced, it seems to me that there must be some impact on individual workload. The judge accepted that the changes instituted in November 2009 have resulted in increased stress and exhaustion on some occasions. However, I think it was implicit in the judge's findings that this impact was neither very frequent nor very serious.
Hmmm, welcome to the real world. Perhaps other branches could take BA to court if the workload incresed if it was icy and de-icing was required, raining and the pushback crews had to work in the rain. Windy, and the approach was exhausting etc. etc. etc.
Perhaps BASSA should concentrate now on representing all of its members and negotiate with BA as to how this whole situation should be taken forward into the future with the interests of ALL members taken forward not just getting the CSD back into their 'office'.