Originally Posted by UncleLeo

Thanks. This plane takes off from LHR (BA171) in about 90 minutes. Our flight out of PIT (BA170, same plane) departs tomorrow evening. Seat selection not yet reflecting the new aircraft, but for what it's worth I'm seeing 25 seats currently selected in J, and 21 seats currently selected in PE. All of these will have to be reassigned in some form or fashion, and I wasn't sure what process BA follows—if any—to determine whom might get reassigned from J to F, from PE to J, or from Y to PE. In all events, even before the equipment change, I was planning to inquire about a paid upgrade at the airport. Wasn't sure whether having an AA-issued ticket would affect our ability to do so, however.