Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Westminster St James index
The Ship is actually in St George Martyr as was the top western section of Swallow street. All of Swallow street except the lowest section was demolished to make way for Regent street in about 1815.
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1805/Anthony Newman, the Ship, 90 Swallow street, Oxford street/../../Holdens Directory
1811/James Hill, the Ship, Swallow street/../../Holdens Directory