I've been to the Netherlands and back with my freestyle libre in the past and I have not faced any issues with security. Going through security did not interupt the way the libre works, or malfunctioned.
I think it's the wrong forum post to ask under but as from past discussions, GPs cannot prescribe freestyle libre sensors. So you will need to speak with your Diabetes consultant/Endo about it. It's the same for insulin pumps and CGMs. Consultants can approve funding for it and get the process up and running if he or she agrees that you fit the criteria.