Originally Posted by
aristoph
I get that. I just wanted to verify that BA does not bring forward scheduled departure times and adjust the 20 mins gate rule to before the new, earlier departure time.
Broadly it's yes and no to those queries respectively, that is the 99% plus scenario and applies in this case.
Sometimes a flight is retimed on the day, it's fairly rare, but boarding passes and ba.com will show the correct timings.