How accurate are the online seat maps when requesting seats? Reason I am asking is I just picked seats for a trip from MCO-LGW in October. I was able to get 2 economy seats in the upstairs bubble of the 747 but when looking at the rest of the map, it looks like the seat map shown is for one of the LHR based birds. Is it unusual to see these swapped between bases? I just want to make sure that I can still experience sitting upstairs or if I will have my seats moved. I can easily keep an eye on the map as time goes but just thought I would ask the experts. Thanks in advance.