That's the rub, just enough to keep the other half in films during the flight whilst not breaking your bank.
I personally think Unite will dive in before it gets really critical. They're just waiting to see how far BASSA can take it before reigning them in. They can't do it too early as they don't want to be seen to give BA management an easy ride.
I've not heard much from Amicus on all this. It should create an interesting balance as they're both part of Unite.