[loldis]

Originally Posted by disneymike

Before Brexit, this was all governed by the often quoted EU regulation 261/2004, a wonderful creation that once allowed me to claim 600 pounds back for a delayed 'Wow' flight that only cost me 200. Luckily, one thing the government managed to do right before Brexit was port that whole regulation into domestic law, the catchily named 'Air Passenger Rights and Air Travel Organisers’ Licencing (Amendment) (EU Exit) Regulations 2019'.

Now ridiculously, both the EU reg and UK law leave it up to the airlines to define what counts as a significant change, but in the case of BA, for many years they have defined it as 2 hours. The low cost airlines have historically been a bit less generous and defined it as longer periods.

So to cut a long story short, whether this is a flight number change or not you should be able to beat them into a full refund in your case.

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BA increased this to 4 hours last year. So at the moment, it doesn't qualify as a significant change unless as others have said, the flight number changed as this may point to cancellation rather than rescheduling.