I remember the last VAT visit we had. The guy spent all day going through the records, getting more & more frustrated. In the end he said "I'm not going to find anything, am I?" I said no. He said " One last try. There's an invoice for a camera here. Show me the camera". So I went into the office & got said camera, at which point he said "No one can ever do that! I'm going home!"
Haven't seen him since