Sorry Caz, that's been asked before and dealt with.
They are not questions that need answering in the context of this thread. But, as you asked, you're discussing component parts of the process I referred to - Maintaining the Build Standard.
Rather, the key questions are;
1. Why, in the Financial Years 1991/2 - 1993/4 did the RAF and PE senior management agree to cut the necessary funding, so compromising the mandated requirement to maintain the current build standard? (Noting that, in the same period, the Secretary of State actually introduced a higher and more expensive requirement which required safety cases to be underpinned by a maintained build standard).
2. Was this contradiction and the resultant increase in safety risk notified to these senior staffs? (Yes).
3. What did they do? (Slash funding even further).
4. Have subsequent accidents been traceable to these actions? (Yes).
And, going back to the correspondence discussed earlier - Did anyone in the addressees' management chain support all the above actions? YES!!!!!!