Cathryn said:It's an utter nightmare, pedals. We nearly weren't allowed on our flight to France for the beginning of our trip because we couldn't get the pedals off. I was close to crying.
My advice would be to get them loosened here in the UK and then YOU do them up to a tightness you can undo again. Then, before you fly home, get a shop to loosen them and do it again. That way, you'll always know you can undo them.