Unite supported this action because it has the potential to other UK workers, a question to OH Parsons, (bassa solicitors), about costs if the judgement goes against Bassa was responded to with the answer, Unite are prepared to cover all costs.
Whilst this may be a victory for BA management today, in the long run it could have an impact upon other employees of other companies. In effect the words 'this forms part of your contract of employment' can now be ingnored by employers as desired. Close to home on this site is the BA pilots Scope agreement, (an equivilant to Cabin Crews Scheduling agreement). Whilst one judge has ruled that it legally binding, this victory now provides a current precedent for another judge to reconsider - should BA management wish to make changes to Pilots agreements.
I am not making idol threats or stirring trouble here, I'm illustrating that this judgement can now be used to justify other alterations to other workers agreements within the UK.