Here's an interesting archive film that I spotted on another forum and on Facebook where it has sparked some interest, hopefully it is of some interest to members here too.
It was apparently made by BASI back in May 1976 and is titled "The Official British Ski Instructional Film":
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www.youtube.com]
Interesting to see how much snow was around on the hill at the time and also, of course, to see the way instructors were trained at the time and how they were expected to ski and demonstrate!