Originally Posted by
bermudatoad
Also - should she have got an email to advise her of the seat change?
This also sounds like it could be a reappearance of a bug that we've seen before that meant that not all of the seat map would be displayed on ba.com. After all, the aft cabin is not closed because there are already some passengers seated there. At any rate, the seats in the aft cabin do exist, as the seat map posted by
Tobias-UK shows.
When BA changes your seat, BA does not tell you. That's one of the reasons why MyFlights is such a useful tool.