I am actually a little worried about the length crossing the pond. 6 hours, figure at least an hour off of either end for take-off and landing, plus at least a half hour for food - that leaves you like 4 hours of sleep. Almost too short. I have flown the route several times before, but I always take the day flights. But jumped on the chance to get into First this trip. I might just give up on the evening meal completely and eat in the terminal and get a little extra sleep.