Take all the care you want. I went through airport security with a .22 in my coat pocket. They are very small, it fell into the bottome corner where the seam is. Red light went off, police showed up, plane was delayed. Cops were fine, no big deal, i showed them my ID and my hunting licence (they didnt ask for a PAL until after seeing my hunting card). Showed them the PAL, while airport security were trying to find it in my kit, the cop and i were discussing kids and guns as I dont own a .22 but my kids do. He thought it was cool that i take them to the range, and then once the round was bagged, i packed my kit back up abnd they said have a great flight.
Wat would have happened if it was a friend who was out shooting and a they didnt have a PAL or a hunting licence? for me i was subjec to search by because i was getting onto an aircraft. My house and my car are mine. The airplane is not.
Justified doesnt mean what you think it does. A justified search is not one that starts illegal that you submit to.