So the debate begins....
AR for no Benchmark
AR for incorrect clearances around an appliance (for servicing)
AR no screws in short horizontal flue passing through a wall cemented both sides.
All three above are real at risk situations, how many would you turn off? The instructions I have ALWAYS worked to are, "with the consent of the responsible person the appliance should be switched off". I always put stickers on and get the warning notice signed "switch off refused".
Our registration is a proof of qualification and competence, not a Gestapo badge. If you contact gassafe, they will always say it's your call, some use no common sense. I carry out a risk assessment and act accordingly. With a WP of 17mb and max burner pressure of 11.8mb with a non steamer without a zero governor gas valve, there would be no risk. The RGI was working on the basis of max 1mb drop to the appliance - this would have to be shown by a test nipple downstream on any additional restriction such as a gas cock or the gas valve itself.
Edit What was the working pressure at the meter? Standing gas pressure proves nothing except that pressure is there?
for lack of service access to be AR there would need to be a potential danger, ie FGA reading too high or something