Originally Posted by
LDNConsultant
I upgraded from a Y (fully flexible) return from LCY - AMS and for my return segment I upgraded via MBB to CE Seat. Before upgrading I called BAEC to confirm with the phone rep that it was indeed a fully flexible CE ticket.
Unfortunately you have been told porkies - MMB upgrades ("POUG" or "Proactive Online UpGrade") tend to render the legs you use them on completely inflexible, regardless of the original type of ticket. This should have been made very clear to you in MMB though.