It wasn’t just a quick dump of snow. It was literally two bouts of blizzard-level siberian anti-cyclone weather, that went on for almost 2 weeks.

Food, dairy, coal, and even water trucks slowed to a halt. The grid went down, gas pipes wouldn’t flow, and toilets would not flush. People were stranded in their cars on motorways. England/Scotland/Wales was split into several disconnected islets separated by snow.

Then of course came the huge floods after. It’s actually crazy how drastic it got. 120 people died (mostly babies and elderly). Roughly 200 million pounds in damages (~ 5 billion in today’s money)

Also, if you look at the timestamp at 46:14, it looks like the designer for the production was Ridley Scott !

https://en.wikipedia.org/wiki/Ridley_Scott

After graduation in 1963 he secured a job as a trainee set designer with the BBC, leading to work on the popular television police series Z-Cars and science fiction series Out of the Unknown. He was originally assigned to design the second Doctor Who serial, The Daleks, which would have entailed realizing the serial’s eponymous alien creatures. Shortly before he was due to start work, a schedule conflict meant he was replaced by Raymond Cusick.[22] In 1965 he began directing episodes of television series for the BBC, only one of which, an episode of Adam Adamant Lives!, is available commercially.[23]