Unlike the BASSA leadership I think TW does have the interests of his members at heart.
I think he realises that he needs to salvage as much as he can from this mess - he knows another strike is unwinnable and will destroy the livelihoods of 4500 of his members - so has approached BA for a couple of extra sweeteners which he can recommend over the heads of BASSA.
If I'm right it will be very interesting to see how BASSA spin this as a 'victory'.