Please see the link to the Government’s website for comprehensive information related to transportation of cooling gel packsfor essential medical purposes:
https://www.gov.uk/hand-luggage-restrictions/essential-medicines-and-medical-equipment
The gov.uk website states:
Essential medical equipment
You can take medical equipment with you if it’s essential for your journey. The equipment is screened seperately and you must show documentation from a qualified medical professional, such as a letter from your doctor.
Whilst we can advise that the airports and airlines are well used to diabetic travellers carrying FRÍO wallets, it is best to check ahead of travel by advising the airline.
If you are travelling from a provincial airport, we would recommend calling the airline and airport ahead of travel to be on the safe side.
What is incorrectly suggested in the information published is that a cooling gel pack (your FRÍO wallet) can go in ‘hold’ luggage – insulin should not be transported in your suitcase as it may freeze in the hold – it should be carried in your hand luggage.
GP’s letter: we always recommend that FRÍO users take a letter from their GP (or a prescription) stating their requirement to carry insulin.
When you check-in at the airport advise the the check-in clerk that you are a carrying essential medical equipment – your cooling gel pack (FRÍO) and have your GP’s letter or your prescription to hand.