I'm flying to LHR on Thursday and am waitlisted for an upgrade. I wait listed last Thursday within 3 minutes of the departure time, so as soon as I could get on the list. Looking at the J availability, there's just 1 seat available for purchase, but looking at the seat map all the seats seem to be taken. So, question time: where is the 1 seat that seems to be for sale? And will this one be made available for some lucky person (maybe me?) to upgrade?