Hi Barbara,
My teenage son is an insulin dependant diabetic. I agree with everything that has been advised. We have been asked to see the medical letter twice at Paphos airport and they have taken it away to photo copy it. Although my sons letter does state that he can carry a sugary drink, this was taken away at Gatwick airport so he now carries glucose tablets instead. We always tell the security staff before our hand luggage bags go through the scanner that we are carrying insulin, needles etc and we have never had a problem. I say WE because I always carry back up of everything, which his doctor advised.
If your friend is travelling alone it might be a good idea if he lets the crew on the flight know, we have always found them to be very understanding on all of the airlines we have flown with.
When travelling my son always wears a chain with a medical pendant stating he is an insulin dependant diabetic with an emergency contact number.
I would think he is aware to carry a snack, but it is essential when flying in case of any delays.
I hope you have a great time when your friend arrives,
PS We use Tesco's for or annual travel insurance Mark
