Yes always have a photocopy of your passport, better still take photos of the main pages using your phone. If you do lose your passport it's a doddle these days to get an emergency travel doc to get you home. You can apply online at Get an emergency travel document and it'll ask you to upload photos of yourself and your passport. The ETD can be collected from the consulate (or you might even be able to get it couriered to your hotel).You get this a lot in Europe. I always take a photocopy of my passport when they ask - saves any risk of losing it while you're ****ed. They've never once asked to see it at the stadium though!