I had a layover at Heathrow airport twice for a trip to and from the middle east a couple years ago. The middle eastern airports were less muslim than England was, and they smelled better too. I could not believe how cramped and crowded Heathrow was, and how much it smelled like urine everywhere. Plus more muslims than you could find in the middle of, well, the middle east! The middle eastern airports were so much cleaner, so much more well ordered, and although they smelled a bit like random spicy foods, at least they didn't smell like urine!