salad-dodger
You are not my target audience because you understand. I repeat myself because the turn-over in a 250+ strong MAA, and the wider MoD, must mean a great many at any one time do not understand and/or are not told the truth.
Please carry on discussing the finer points. It is interesting to see how often MoD has changed its approach to risk analysis, risk evaluation and risk management. With the passage of time, MoD policy and practice has become ever more contradictory. My approach was, when in doubt, adhere to the Chief Scientific Advisor's Guidelines for Technical Scrutiny. (Called "Guidelines", but mandated upon all Air Systems Controllerate staff).