Elections centre established by Colin Rallings and Michael Thrasher, Associate Members of Nuffield College, Oxford has a wealth of data on local election results from 1964 onwards. They include local election data handbooks with results and analysis. Those from 1964-2011 can be downloaded free of charge, more recent handbooks are for purchase only. However, tables and graphs with council compositions and results can be accessed online for more recent years.
The Universal Ballot Database has been built from the data. It uses Google maps to show all of the current ward boundaries across England and Wales together with the name, party and votes of the top-placed candidate at the most recent election for that ward.