That's a very interesting post indeed about a part of the plan to train aircrew during WWII.
British Commonwealth Air Training Plan - Wikipedia
One of your links mentions No7 Air Gunnery Training School at RAF Stormy Down in South Wales. One of my relatives, who was later killed on night operations, trained there in 1943. Most of the pilots there at the time were Polish or Czech and the aircraft were worn out Fairey Battles. Apparently the pilots were so bored flying would-be air gunners around plinking at drones towed by tugs they took books to read while they were flying!