I woke up on board a 747. Once I’d remembered why, I looked at my watch, and estimated we were an hour or two from landing. I took a drink of water. Soon the BA flight attendants started bringing in breakfast, and I gently prodded the spouse awake. Against all probability, I had managed to get 2 or 3 hours of pretty decent sleep onboard an airplane. Soon we landed at Heathrow Terminal 4.