I was chatting with my Warrant one day when I totally lost the thread of the conversation and started staring over his shoulder. After say "Sir? Sir?" a few times he turned around to see what could so distract me from his pearls of wisdom, to see the 2 broken trainee gunners who were holding in the bomb dump in full NBC kit struggling with a voluminous, though seemingly empty, black plastic bag. After looking aghast for a moment, he said "Leave this to me sir" and disappeared after them to find out what was going on. It transpires the plumbers had told them they needed to take a bag of contaminated air to the Med Centre for disposal. It wouldn't have been so bad if they hadn't turned up at the photogs' a couple of weeks before wearing respirators for their "shelter pass photo"...