British National Archive Public Information Films
From the Librarian's Internet Index:
"Use this website from the British National Archives to view public information films. "The first selection of films from 1945 - 1951 features some fascinating events from Britain's [post-World War II history]." Includes a timeline, background about this period that was characterized by austerity and financial instability, and short movies on subjects such as surviving the fuel crisis, using a hankie when sneezing, the Berlin Airlift, and the Festival of Britain."