Originally Posted by
Andriyko
That is really strange. It is still your TA’s ticket. They are using commercial inventory for the upgrade. They absolutely can change the ticket but they will need to ask BA to reinstate the voucher. The only upgrade situation where the TA would lose the ability to service the ticket and BA would take over is when Avios are used for the upgrade. I can’t think of a reason why your corporate TA would not touch their own ticket. I can understand why BA would not touch it though.
I agree it's a bit awkward, but I can also understand the TA's perspective as they are not the ones who applied the voucher. I am not quite sure how they would have the voucher reinstated once someone has flown the outbound and wants to change the return sector (which from memory is what I typically need to do). With the aforementioned workaround BA is usually happy to make the change(s), but it takes a bit of effort by having the TA store the fare information in the booking.