There was a wonderful quality assurance acronym back in the early 1990s: DIRTFT, Do It Right The First Time.

If BA had simply not let the pilot dispute get to the point of actual strike announcements and had it not sent out the daft erroneous cancellation emails late on Friday the ensuing chaos would not have happened.

All of the suggestions made at the start are useful ideas but the call centres would probably been more likely to deal with the call volumes had it been restricted to those whose flights truly are cancelled on or around the actual strike days.