Night vision goggles and imaginary dogs.
In all boarding schools you have different teachers who enjoy the art of busting and purposefully go out to catch people smoking.
There was one teacher at a school called Marlboro (pronounced MAHL-bruh, not to be confused with the cigarettes) in the south of England. He was an ex-RAF and seemed to think that he hadn’t quite left the army. One evening he decided to phone up some of his pals still in service and borrow their helicopter so they could fly over the school, catching anyone having a fag on the roof of the building.
Now, you might get a little confused as to how he could see their faces in the dark, but not to worry because he had a pair of night vision goggles.
Imagine. There are you having a quiet cigarette when you suddenly hear a voice blasting from above via loudspeaker: “You have been busted. Drop the cigarette, stub it out and remain where you are.” Haha stupid fuck, can’t see who I am. “And in case you are wondering, I can see you. I have night vision goggles.” Shit.
True story told to me by a friend busted for smoking by a guy who regularly walks his imaginary dog in the middle of the night.

In my old school (not the current one), there was a teacher who (seriously) skulked around the bushes trying to catch people smoking. And this was a public school! Perhaps somewhat ironicly, my current (private) school is more normal than my old one!
Whereabouts in Scotland are you anyway? I haven’t seen a single pinoy in Glasgow lol!