CFE had no interview because they were taken over and employment law was on their side.
BA would have done anything not to have them on the master seniority, as would the 50 or so people who lost their (rightful) command chance because of some made up Grandfather Rights issue which was allegedly a lie by BALPA.
BRA is a wholly owned subsidiary. A totally different proposition.
As for the secondees, surely you should know by now the parent company can pretty much do as they like with the child.