The chance of BACF length of service giving equivalent ‘slotted in’ seniority for the purposes of fleet moves, at any point in the future is NIL. (Hopefully that is clear enough). As for it happening with any future merger with another company? It didn’t happen when Cityflyer merged back in the early 2000s, and it didn’t happen with the BMI merger - but it depends what is negotiated at the time. The only thing that did happen with BMI, was an agreement giving limited grandfather rights for a small number of long haul commands each year, on the most junior long haul fleet. This was a reflection of BMI’s limited number of long haul hulls pre-merger (but that won’t apply to BACF anyway). Once on that most junior long haul fleet, they remain at the bottom of the seniority until a more junior BA pilot gets their command on the fleet (which I think probably means - until they retire).