Schneiderman, try http://aerade.cranfield.ac.uk/ to search R&M’s. They are having tech problems at the moment, but it still kind of works.
.

Yes another great resource but unfortunately few R&Ms have been scanned so far. Silly thing is that I have a complete set of inter-war R&Ms but no index. Looks like I’ll have to run through the annual reports to see if there was anything plausible and then dig them out from under the bed.