Originally Posted by
JAXBA
This isn't strictly true, as some GDS systems aren't capable of revalidating and so always reissue. A reval would probably work in your favour, if it can be done, as the tkt date of issue would still be July, whereas what would happen with Avios earnings after a reissue is an unknown at this point. There should be a way for BA to determine which earning method to apply, but there will probably be some mistakes when the changeover happens, that you'd have to follow up on and request re-consideration. We don't know yet though.
Apologies for reactivating this old thread. I did ask this in another thread but got no firm answer. Do we know yet what happens in this case? I want to change away from a (now) DAT operated flight booked before October 18th, 2023. BA told me it's possible but the ticket would be sent to the back office. They could not tell me if this would be revalidation or reissue. Failing that, CE is available (and empty) on the DAT service, so an alternative might be to UUA. Same question there? has anybody done this?