Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Denham pub history index
Directory of Pubs in the UK, historical public houses, Taverns, Inns, Beer Houses and Hotels in Buckinghamshire. The Buckinghamshire listing uses information from census, Trade Directories and History to add licensees, bar staff, Lodgers and Visitors.
The following entries are in this format:
Year/Publican or other Resident/Relationship to Head and or Occupation/Age/Where Born/Source.
1863/Henkins Harman/& nurseryman/../../Duttons Directory ***
*** Provided By Colin Ager
**** Provided By Kevan