The nuclear war prep pamphlet from the eighties, Protect and Survive, was apparently also a collection of short films, closely following the text of the information booklet. As I own a copy of the Imperial War Musuem reprint, I can attest that the information provided in the clip above, about disposing of bodies, was immediately followed by this paragraph:
On hearing the ALL-CLEAR
This means there is no longer an immediate danger from air attack and fall-out and you may resume normal activities.