Originally Posted by
Purim
How the app and the BAEC page on ba.com could not handle the re-booking (app messaged me the following day to tell me the cancelled flight was ready for boarding) probably a subject for a different day.
I find the app is usually quicker than any other source - including the terminal monitors. Especially handy with delayed flights. I've even had it update my boarding pass when I have been upgraded without me even knowing it's happened.