"Sorry mate, I know we said you'd be able to take this exam today, but due to a thread on PPRuNe we're now having to take the mindless bureaucracy seriously.
"The next time someone will be in who will be able to supervise you taking the exam will be Wednesday fortnight.
"What? You can't take time off during the week and need to do the exams at weekends? Well, he'll be back from holiday with a spare weekend slot sometime in December.
"Yes I know I did it last time, and yes I know all the papers are in that drawer there, and yes I do have the key, and no I don't have anything better to do just right now (look at the weather!), but them's the new rules, more than my job's worth. Like I said, sorry mate."