I’ve just come back from Tenerife, I paid a tenner for a letter from my doctor a couple of years back that I have never had to use, but I like to know I have it. I always put my needles and 2 x bolus and basal in a clear bag in my hand luggage. I have a libre a head full of metal bond extensions and metal coils in my veins and I breeze through security. Where as my teenage son has to go through multiple times as he didn’t listen to me and take his switch out of his rucksack and his phone out of his pocket !! 😡