This film chose itself by featuring a couple of amazing innovations that are no longer with us but at the time were the white heat of technology.
Punch card writers and readers. Once, these were cutting edge technology. Now, da kidz won't have a clue what they are or why you wouldn't just tell your computer what to do. They aren't completely forgotten though - railway modellers use the chads punched out of the cards as individually applied bricks in 4mm scale.
I wonder if anyone still has the puncher? Could be a nice little business there.
The second is the BR road/rail trailer memorably modelled by Scalecraft and sold by Peco. Another on the list for a Parker built. I even have the kits stashed away...