Sounds of the city - Britsh Library sound clips from 1947 and 2010

http://www.independent.co.uk/news/uk/home-news/the-sounds-of-the-suburbs-britain-is-a-quieter-place-2268438.html

The suggestion is made in the article that modern Britain is a quiter place needs to be challenged: certainly individual vehicles make less noise, however there is far more traffic and many more high speed urban roads, that provide a permanent background noise.