[Observer1940]

Larry

Thanks for the suggestion, the Duxford IWM was where my research journey began about fifteen years ago and despite acquiring the odd copy from Lambeth, I never gave Duxford a thought recently and they ought to know as they fly historic aircraft.

There are some related subject files in the various TNA Series, still to be exhausted, which might contain an odd snippet of extra information.

I have found at least three different spellings for Carburettor in various countries!

Regards Mark