If the BAcc forge ahead with their current plans the whole thing will almost certainly lead to a court case challenging the very basis of seniority.
Agreed, plans are already being laid. If the rumours of what is being planned by the BACC are true then a court case against BA is pretty much inevitable. Of course it will only come to court if BA bother to contest it and why would they? I am pretty sure that most senior BA managers won't be shedding too many tears if seniority were ruled illegal.