ACMS climb down from your soapbox and read the other thread title "KA to implode"
No seniority for KA pilots coming to CX. You will have to resign from KA and join CX on COS 08 at the bottom of the list. I'm sure you think that is just fine and dandy but in a private reflective moment, just consider what your reaction would be if it was the other way round.
Oh and by the way, under UK law (TUPE), stripping seniority in a merger or takeover is illegal, no matter how great you think are.