The amount that BA want from each group is fixed - it has already been stated. The time period over which those savings are required is fixed and has been stated. Delaying does not change either of these, indeed it just means that the savings will be recouped over an ever reducing time period - they will be more severe. BASSA has done its members no favours on this, the longer time goes by the worse for its members the changes will be. WW on the other hand has neatly pushed any likely industrial action away from the school holidays and the nasty headlines of BA ruining lots of holidays. Without going much further BASSA have not played this smartly.