I did find some MiD details long ago and am trying to remember where - they were paper records at Kew, and as far as I can recall all there was consisted of the name and rank, without any specific details.
I'm sure someone will be along shortly with more info; I couldn't find anything useful in the TNA research guides (although it does have useful links to ADM and AIR series for Navy and Air Force, and for WWII).