It has been pointed out many times here before - but once again just in case you missed it. Flight Crew salaries have been benchmarked against other airlines - or in blunt English, they get the going rate. Cabin Crew are being paid, on average, twice that of their nearest competitor.
Given the large wages that BA LHR CC earn it would not be unreasonable to expect that they are part of a flexible workforce delivering a high quality service. Unfortunately that is not what happens at LHR - any small thing happening out of the ordinary and someone is onto the union to find a way of saying NO. The only exception to this is when another 5 minutes would trigger another Box payment. Things need to move on, BASSA has an opportunity to be part of the solution - rather they choose to be part of the problem.
All discussion etc on these matters has to be complete by the end of June, then WW will start imposing change. Better to allow productivity changes to pay for the savings and keep the salary the same than see imposed cuts in both pay and conditions.