I can’t keep this up but it’ll have to do for now.We’re learning about plaster bombs in Explosives Training. The trainer is a woman called Mrs Harris, who has a face that doesn’t seem to move much.Plaster bombs are creepy. The only way to disable them is to fully immerse them in liquid. But chucking a glass of water at them isn’t enough. They have to be properly soaked.We’re halfway through the lesson when Harris says, ‘Right, I think it’s time for you to see what you’ve learned. Come on, everyone.’We follow Harris across the courtyard towards the building where all the gyms are. Instead of going in the usual direction, we’re led down several flights of stairs into a gloomy basement and towards some big, glass double doors where an armed guard sits, looking bored. Harris speaks to him and he lets us through. We’re facing a corridor with a series of plain white doors.‘One room each,’ says Harris, unlocking the one in front, which happens to be right by me. I step into a small, white room.
