Let's also consider a SH/LH split. Maybe in the not too distant future ;-).
SH drivers and new joiners on vastly reduced T's and C's and further selection required before getting your "new" position at BA longhaul and back at the bottom of their seniority list also with new T's and C's for new joiners.
Perhaps the new short haul airline could be called "Go" or more inventively "British Airways Shuttle".
Good luck to y'all.