Doesn't BA offer the possibillity to have a joined roster?
Only to cabin crew. Pilots can bid for similar trips/days off to their spouse (pilot), subject to the usual seniority stuff. However, it involves an awful lot of swapping and dependence on other people and their outside influences to enable a pilot/cabin crew couple to fly together. I've been asked if I would swap trips on occasion for this reason. Sometimes I have, sometimes I haven't.