Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
St Luke pub history index
The following entries are in this format:
Residents at this address.
1881/Harry H Finch/Licensed Victualler/36/London, Middlesex/Census
1881/Mary E Finch/Wife/35/Lambeth/Census
1881/Elizabeth Gosling/Domestic Servant/22/Edgware, Middlesex/Census
1882/Henry Finch/../../../Post Office Directory
Provided By Kevan