I don't doubt for a second that BACX T&Cs require improvement. Also, I have no objection in principle to BACX pilots having access to BA mainline fleets. However, they cannot have their cake and eat it. If they want full access to mainline, we want full access to BACX.
I write as an ex BAR 737 and Bus driver who wants to go back for a command at BHX on the BA Regional network. Just for interest, when the existing secondees took their positions, I was frozen on type at LHR and unable to bid.