Had to wear the full aircrew nbc kit when i was doing my trade training at cosford. Absolutely hated it. Only wore it for about half an hour and that was just walking around the outside of a. hangar whilst the trainee armorers gave us some strange looks. Then again since trade training i have never seen an AR5 since then in the world of squippery. I wont complain though. They were just as nightmareish to service aswell. Atleast you can have a bit of fun turning other peoples whistling handbags off when its all connected. Usually puts them into a bit of a panic!