PDR1
Well there's three engineers and three answers (although they agree in fact and differ only in opinion!).
Like it. But the point is, if each of us implemented mandated regulations, physical and functional safety would be assured, as far as possible. Each of us would bring our own experience and training to bear, and our approaches might differ a bit, but the output would be the same. But MoD doesn't implement its own regs, and its definition of functional safety is positively dangerous. And it would seem it doesn't require output!