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.
St Giles pub history index
A listing of historical public houses, Taverns, Inns, Beer Houses and Hotels in St Giles in Fields, London.
Residents at this address
1829/Thomas Boyle, Robin Hood, 26 Church street, St Giles/../../Pigots Directory
1833-34/Thomas Boyle,
Robin Hood, 26 Church street, St Giles/../../Pigots Directory
1839/James Mason/../../../Pigots Directory
1842/James Mason/../../../Robsons Directory
1848/William Mason/../../../Post Office Directory
1851/William Parker/Publican/24/St Giles, Middlesex/Census
1851/Ann Parker/Wife/27/Ireland/Census
1851/Barbara Mason/Mother in Law, Widow/80/Ireland/Census
1851/Ellen Mason/Sister in Law/30/Ireland/Census
1851/Barbara Mason/Niece/6 months/Ramsgate, Kent/Census
1851/Jane Lynch/Servant/30/Ireland/Census
1851/Ellen Sullivan/Servant/26/Ireland/Census
1851/William Walsh/Potman/24/St Giles, Middlesex/Census
1851/Jeremiah Daley/Inspector of Water Closet/25/Ireland/Census