I'm bemused. I've received several DUB-BRU schedule change emails over the last few weeks.

My original flight number number FR1452 has moved to the earlier FR1456. My new arrival time is now 4hrs 15 minutes earlier. So apparently I'm entitled to either accept the schedule change or move flights +/- 1 day on the same route.

However the system tries to apply a change fee of €45 per flight plus fare difference despite the email message:

2. Change your flight for free • You can choose to change your flight to the next available flight on the same route or to a flight departing one day before or one day after your new departure time. There are no flight change fees and you do not have to pay any fare difference.

Since when does a flight number change Not constitute a flight cancellation?

Anyone got any suggestions on how I can at least get a flight credit or refund?

Suggestions appreciated