In a couple of weeks time I will be traveling with a friend from London to Paris on the Eurostar. He has a Greek National ID card which he assumes will be enough to travel with. The Eurostar website however states
"All passengers, including infants, are required to have either their own valid passport. (or national identity card for French and Belgium passengers) "
The National ID is only specified here for French and Belgium but not other countries. Is there anyone who has traveled recently on the eurostar from London to Paris using a National ID card from either Greece or another EEA country who can confirm if it is ok?