Not a question, just a warning,
Many of the Credit Card machines give the option of paying in Sterling or Euros.
You get a slip AFTER the event informing you that you accept you were given the option of which currency to use and there is no comeback
We were automatically allocated to GBP on several occasions without being consulted!
So remember to check currency before it's too late.
We always opt to pay in euros as we get much better rate of exchange from home bank.