That's another story ...
The BA DEP's who were disadvantaged when the BCal pilots were absorbed into the seniority list took BA to court.
The case was initially won. BA appealed, and it eventually went to the High Court. The Master of the Rolls, (who used to shoot grouse, and other unfortunate game birds, with Lord King, BA Chairman) overturned the decision.
Some of the BCal pilots had tried to join BA previously, but failed the selection. They were now absorbed, and senior to those who had passed.
Time to command, for the original BA FO's was significantly affected.