E111
It is also worth remembering to take an E111 form with you if flying within Europe.
I recently took my mother to Le Touquet for lunch where unfortunately, in the restaurant, she had a stroke. The hospital was very good but they were also very keen to get their hands on the E111 which unfortunately we hadn't taken with us. It was just one more concern that, at the time, I could have done without.
I shall always ensure that I have mine with me when I fly abroad and will strongly advise anybody I might take with me to do the same.