I’ve just been through security at Gatwick South with a spare Libre in my hand luggage. I had it still in the sealed box, and I just handed it to the security guy and told him that it was medical equipment and that it couldn’t go through the scanner. He said that’s fine, he knew exactly what it was & he took it round to the other side, where they did swab tests on the box (for drugs or explosives, not sure which, but it was all quite relaxed). They didn’t open the box because it was obviously still sealed from the manufacturer. So not too bad an experience at a very busy security area in a major airport.
I wasn’t wearing a sensor as I’m T2 and only use one occasionally to make sure I’m hitting my targets.
Just thought people may find it useful to know if they’re travelling.