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.
All Hallows Lombard Street pub history index
This is variously referred to as the Colonial Dining Rooms, Colonial Tavern (in 1882 only), the Colonial, and the Colonial Restaurant, so it may have been more of a dining rooms or restaurant than a tavern. *
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1874/Samuel Hay/Colonial Dining Rooms/../../Licensed Victuallers and Hotel
Keepers Directory *
1882/Henry William Gladwell/Colonial Tavern/../../Post Office Directory *
1884/Arthur West/Colonial/../../Post Office Directory *
1891/Miss Catherine Pritchard/Colonial Restaurant/../../Post Office Directory *
* Provided By Ewan