because he knows that if this is the case, then the cost saving to BA for each individual pilot only exists for as long as he decides to remain on OS T&C's...
And because they're perceived as such a pittance, one must assume that, therefore, the saving will only persist for as long as their initial freeze on "type"...
There are ways around these things such as an agreement as to which pay point OS guys would come in on, it is also somewhat balanced by the fact someone has to be doing the mainline job anyway, and the possibility of mainline pilots joining OS (on OS terms).
The big point is BALPA have conceeded the OS t&c completely, ie BA can offer any contact they wish. Any costs increases will be small and BALPA have said they will talk to BA to address any concerns they may have.
In short 4468 is correct as to the real reason why BA don't want a common list. Unfortunatly for BA this has been tried before and the pilots know about it as shown by a thumping ballot result.
Since I am here a note on the court case, BA say we are impeding thier right to set up a buissness in Europe. Nonsense we want it to be a success and are on record saying so. I remember when project lauren was unvieled the intrest and excitement generated amonst pilots, as 4468 says welcoming expansion. All this could be resolved easily but BA don't want to because their long term objective can not be met if there is common list.