The University of Essex has created a collection of British Historical Population Reports. The site contains no entries about people listed in the census records but does provide a wealth of background information of interest to genealogists, historians, and others.
Quoting from the Histpop web site:
Note to genealogists and others tracing individuals: This site only contains a very small number of reproductions of original census enumerators' books for illustrative purposes. If you are trying to trace individuals in historical British censuses you should use the links found on our links page.
If you would like to learn more about the British census records, take a look at http://www.histpop.org.