Sources for researching the history of London's government

Much of the information on the history of local government would fall within what Wikipedia defines as 'Original Research.

Sources include:


 * Various websites and lists (Mayors etc, the LDDC page etc)
 * Post Office, Municipal Government and other yearbooks/regular publications (which are produced somewhat ahead of the cover date, and do not note changes between publications).
 * Local newspapers and other records.
 * Books
 * Original documents