Originally Posted by
Im a new user
The right to a refund is "the assistance specified in Article 8(1)(a)" so it seems that BA won't have to refund you unless the delay is at least five hours. If BA offers a refund already after four hours, BA actually offers more than what is required.
that would be for a delay to the scheduled departure time tho.
For advanced notice retiming of a flight like the OP received (and like I have received today for a November booking) the scheduled departure time has been changed. It’s a change of the scheduled departure time rather than a delay to the scheduled departure time.