That looks promising, thanks Zeke - particularly since now doing a quick search on the names this gent was working on Horten flying wings, which is incredibly close to what I'm worrying about.
I will look up what's in the RAeS library when I next get up to town, but it's easier if one knows where to start looking - these gent's work I didn't know about, but armed with some prior knowledge I'm better equipped to start.
Cheers,
G