Interesting indeed.
I always thought, though, that “Squadron Leader Ramsey” was based almost entirely on a similar character in either Richey’s book, or another. I seem to recall reading of a real Squadron Leader Ramsey, who was also nicknamed “The Ram” for saying something about ramming enemy bombers (the exact wording of it I cannot recall off the top of my head, but I’m sure it was in Richey’s book).
If no-one can confirm, I’ll have a look when I get home.