Well, I'm back in the UK now. And I was surprisingly able to grab some shuteye on the flight over. Despite it being a busy and crowded flight. No upgrade. I hope the last Mission Impossible film is still available when I fly back - because I fell asleep when trying to watch it and I don't know the ending. My flight was delayed leaving, and I had already arrived really early at the airport, so I might have tired myself out by walking extensively around the airport. A good plan for getting some exercise before being stuck in a seat for 10 hours. However, you have my sympathy if for some reason you ever happen to be stuck at SeaTac - not the greatest airport (as confirmed by a recent ranking of 17th for customer satisfaction out of 20 major US airports), not a great food selection, and everything is so expensive.