I started school in January 1963, and was there one day before we got sent tome because the toilets had frozen! Although i think that was the only time I had off for snow in my entire time at school.
Fascinating documentary, but rather odd for it to be shown under the Winterwatch title, as the wildlife angle was only really brought in afterwards. It would have sat perfectly well on its own either on BBC2 or on BBC4. I'm sure there are lots of old factual programmes like this which could be shown and would be of great interest.
I was 9 that winter and although I remember trudging to school and back through heavy snow for weeks and weeks, I don't remember school being closed. However, as all the loos were outside, on the opposite side of the playground from the school building, they must have been frozen so I can't see how the school could have remained open.