Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Manchester pub history index
Directory of Pubs in the UK, historical public houses, Taverns, Inns, Beer Houses and Hotels in Manchester, Lancashire.
Residents at this address
1895/William Bass/Unicorn, 1 Union Street, Lower Broughton/../Slater’s Directory
1911/George Sandford/Unicorn, 1 Union Street, Lower Broughton/../Slater’s Directory
1929/George Goodfellow/../../Kellys Directory