Back then, God Save the Queen (which was still our national anthem at the time) was [layed at the commencement of all kinds of events...INCLUDING FILMS, fer crissake...and one was expected to stand.
Gwad, I remember those duck and cover drills. They'd have a room of 25 kids all run to the farthest row of desks away from the wall of windows and all try to duck and cover under those tiny desks.