I will be flying TPE-SIN-LHR very soon and got an e-mail that invites me to bid for an upgrade. I have paid for a PE ticket but the invitation to bid was only for the first leg and not the connecting long-haul leg. Is it normal that the invitation to bid for two connecting flights would come separately? What minimum amounts are likely to be successful?
If I do not score with advance bidding, do I have an opportunity to bid at the airport on the day of departure as well?