Not originated/recovered by me, however these Ceefax pages are worth reproducing for historical interest/study: https://sway.com/tEGfZ1uGYsAfWfxq?ref=Link
During the 1970s a series of films were made by the Central of Information during the energy crisis. These films all implored people to “Switch off Something” - a campaign from government aimed at energy conservation during the three day week. It’s interesting that in the more than 45 years between these and the recent Corona virus/Covid 19 information films from UK Government these are many parallels; their presentation is pretty much as austere now as they were then. They’re very direct and imposing your get across the message of national crisis. They are an interesting series of films and give a view of how government responded to national crisis and how it intended to inform the public nearly 50 years ago.