Skylion.
You are not correct in alot of what you say. As Jetset lady says the way cabin crew are rostered is alot do do with the fact that pilot rostering is done by a different department. Pilots use a different system of rostering, a bidline system, which in itself is very expensive and needs a high number of schedulers envolved but that is another matter. The two departments seem not to liase with each other as mentioned by Jetset lady. You would have to ask someone in schedualling why I would not want to guess the answer.
BA aircraft nightstop because it suits the schedual and because it would be impossible to park all the aircraft at LHR (as seen during the strike.) It has nothing to do with the way cabin crew are rostered or any agreements we have. Sometimes the union agreements are actually less restricting than the CAA scheme rules.
I really think it important for you to actually be sure of what you are saying and not make up stuff to suit the point you are trying to make.
You will loose any credibility you may have if you keep giving inacurate infomation out.