Gina
That tells me you are in search of the truth on what actual regulations were and what actual colour/pattern specifications were. In other words a serious academic treatise.
Unfortunately the overwhelming evidence that those regulations and specifications were ignored, altered, delayed wholesale throughout the forces at the whim of just about anyone having control over a vehicle means it can never be a record of what actually happened.
Evidence of such wayward behaviour is not only in the form of anecdotal stories but in thousands of photographs of the period and as you have mentioned in official correspondence.
I fear if you are trying arrive at some semblance of order by trying to lock the plan with the action it can never happen.
Lang
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