Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex. If you can contribute to the site, send me some details to Kevan, along with some description of the specific property.
Holborn index
A listing of historical public houses, Taverns, Inns, Beer Houses and Hotels in Holborn - St Andrew, London.
The following entries are in this format:
Residents at this address
1843/John Denman/../../../Post Office Directory
1848/Thomas Rivolta/beer retailer & dining rooms//../../Post Office Directory
1851/Thomas Rivolta/beer retailer & dining rooms/../../Kellys Directory