Glucotabs are great to carry. Don’t melt and in a sturdy tube. You can get them in Sainsbury’s or Amazon and some pharmacists. Do you have a blood glucose meter? That would be very helpful. Remember to take all your meds with you at least twice what you think you will need, keep it in your hand baggage and not in the hold as it coul get lost and you would be stuck. Take a copy of your prescriptions with you and remember travel insurance that will cover your diabetes. But above all have a great time!