I think I could crack being a military analyst
2(a) might be beyond me, but I’m pretty confident 2(b) and 2(c) require the sorts of knowledge I have.
It’s just possible the Cabinet Office wasn’t impressed with the Defence Scientific Advisory Committee in 1971.
On the other hand, it’s expressed in admirably clear common English. If it had been dressed up: “Significant casualty disbenefits result in a significant number of cases where hostile anti-aircraft output eventuates in response to an air to land intervention”, they might have been impressed.
Oh, the good old days in the Civil Service when you didn’t/couldn’t easily send to all, but sent a memo (minutes we called them) on its merry way round a circulation list. I wonder if it actually reached Sir Solly.