Jarvy
Seats are allocated on booking so you are only ever changing them anyway.
I think this varies with carrier? I recall a discussion about seat allocation in here some months ago - pre-dating the current announcement, I think.
One BA member of staff stated that seats were allocated the day before and described the task. Now, this may well have been SH only but they spoke about the problems of it in some detail. It was stated that - up to that point, they are all seat
requests, not reservations. I sit to be corrected.