Thanks for sharing this, Mike. Excellent find and very interesting to see which concepts worked and which didn't.
While searching for more info on the exercise, I noticed the same movie is also available on the IWM and in slightly better quality (?)
https://www.iwm.org.uk/collections/i...ect/1060036573
also spotted a Morris Wireless house type, Mike!, also Austin K3, Bedford MWD, Bedford OY, Scammell Pioneer, Fordson WOT2, Fordson WOT6, Dennis tipper, Water trailers. Awesome stuff