Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Clerkenwell pub history index
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1861/Samuel Thomas Plummer/Beer Seller/28/Holborn, Middlesex/Census *
1861/Eliza Plummer/Wife/25/London, Middlesex/Census
1861/Samuel W. Plummer/Son/3/London, Middlesex/Census
1861/Henry James Plummer/Son/1/London, Middlesex/Census
1869/Miss Charlotte E. Howard/beer retailer/../../Post Office Directory *
1871/Charles Cross/Beer Retailer/37/Staffordshire/Census *
1871/Jane Cross/Wife/43/Aston/Census
* Provided By Ewan