Diesel, Reference your remark that EOG or SHAG as it is now is not on the same terms and condiitions as mainline. Even the pay is different e.g they are capped at pp11 for a F/O and pp 16 for a Capt. The rosteringis via Carmen. There is also a raft of different conditions take a look at the pink pages in FCOs re flight time limitations 1450 - 1478 if my memory serves me right. BALPA is a democratic union and the majority rule. The majority of BA BALPA members are at LHR and so Scope and all agreements are devised with that in mind. BALPA has to protect its source of income, thats the real world.
Remember how many BALPA BACC chairman have moved on to management positions. Yes the company welcome such deals as scope as a back door to cheaper operations. They reward such ideas with promotions, real world again.