I've been looking out for these old promotional/educational films for some time, and now they are on YouTube . It was mainly the old commercial vehicles I was interested in to start with but they give such a great view of what the country was like in the 50s that I think they are a joy to watch. Here's one that relates to the 80. Ok, tenuous link I suppose but the 80 has the same type fuel pump as the prototype being tested here. And this one showing Pickfords Scammels in action Enjoy.