Been there - No T-shirts.

So I bought a sweater.

Been there twice in fact.

First time on a "Junior Officers' Course" as a member of JO10/1 group. we became "The Dambusters", I know not why but could often be seen "flying" around camp going Ta da da da dadada-da, etc. We would pause to chat, hand on a wall. After we left there would be a "bomb-shaped" sticker on the wall bearing the legend
"You have just been bombed by JO10/1 squadron".
I even fashioned a Formica© bomb some 10" long and secreted it in one of the dormitory blocks.
I was down again 2-3 years later on a Breathing Apparatus instructors course - bomb still there. I've ALWAYS regretted not leaving it where it was.
:¬((