I've got a question regarding pricing with GUF2. The TA is only allowed to issue the ticket after the upgrade is confirmed by BA. So the relevant price is the one that's published at the time the upgrade is confirmed, isn't it? This week I had the situation, that I tried to book a GUF2 upgrade via a TA and the price went up by 500 Euros the day the upgrade was confirmed by BA (so after reservation, but before issue of ticket).