It seems that BASSA are now really fearful about the loss of Ts & Cs for the senior/older end of the pay/perk scales. They don't seem to have done an awful lot for the younger, newer entrants or those at LGW.
This also explains the suggestion that BA should introduce a new contract with new terms and conditions and let future crew work on existing fleets instead of introducing an entirely new fleet. This shows that BASSA only cares about excisting crew and their salaries.