I have a few friends there who are in the top half of the BACF seniority list and they have would bid straight into a long haul command.
I cannot see any scenario where that would happen. The scope agreement is there to protect BA pilots. If the rumour is true, BA wants to fly bigger aircraft using a subsidiary’s pilots. There is no negotiation required with the subsidiary or it’s pilots. As far as I am aware, the question would purely be about whether BA pilots allow the subsidiary to operate the flights. If part of those negotiations involves the subsidiary’s pilots gaining a BA seniority number, they would join the bottom of the list, so no leapfrogging of current BA pilots could occur.