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.
Canning Town 1902 Post Office Street Directory
History of Canning Town in 1902 - part 1 & part 2
 Vincent Street, 86 Trinity Street
2 Bilson Mrs Emily, draper
4 Spengler William, boot maker
30a Gerwick Robert, beer retailer
... here is Mary Street ...
32 Henson Wm Thos, shopkeeper
19 Harding Thomas, greengrocer
21 May Ernest, fried fish shop
74 Driscoll John, shopkeeper
85 Limbach William, baker
 Walter Street, Roscoe Street
14 Powell Charles, shopkeeper
 Wellington Street, Stephenson Street to Quadrant Street
St Gabriels Church
Baumgarten Rev Charles Ord (The Vicarage)
Maddison W J, builder
St Gabriels Dunday School Room
St Gabriel Mission House
16 Sedgwick Miss Elizabeth [Mission lady]
 West Road, Leyes Road
1 Lack Mrs Elizabeth, shopkeeper
... here is Royal Road ...
22 Carey Richard, shopkeeper
26 Barrett Henry, fried fish shop
31 Shaw Edwin, dairyman
 Wharf Street, 24 Stephenson Street
12 Green William, shopkeeper
... here is Bidder Street ...
Worland James & Son Ltd, wharfingers (Worlands wharf)
 Wilberforce Street, Forty Acre Lane
1 Dennis Arthur, shopkeeper
Skinner Stephen, saw mill
... here is Walter Street ...
62 Prince Charles, greengrocer
 Wood Street, 278 Victoria Dock Road
Thomson Andrew & John, brass founders
 Woodstock Street, Barking Road to Victoria Dock Road
23 Phillips Edward, greengrocer
29 Wolff Benjamin, hair dresser
31 Joyce William, laundry
33 Mackenney Joseph, beer retailer
35 Beaney Mrs Caroline, shopkeeper
45 McConnachie Mrs Laura, dress maker
85 & 89 Dicks Samuel, wardrobe dealer
87 Murphy Hy, greengrocer
89 & 85 Dicks Samuel, wardrobe dealer
91 Wilson Chas Herbert, boot maker
93 Nobbs Ernest, shopkeeper
95 Eson Mrs Nellie, oil & colorman
97 Conner Richard, confectioner
99 Potton Ebenezer, baker
... here is Burnham Street ...
101 Sadler Mrs Mary, marine store dealer
103 & 105 Smith Mrs mary Annie, pawnbroker
... here is Swanscombe Street ...
Woodstock Arms PH, Wm Mayer
26 Stock Joseph Hy, fried fish shop
28 Robinson William, oilman
32 Williams John, cow keeper
38 Smith William & Co, packing case maker
40 White Edward George, plumber
44 Higgs John, news agent
50 Thake Mrs Sarah, greengrocer
... here is Fox Street ...
66 Corbett William, dairyman
68 Army Recruiting Office
70 Fish William Godfrey, boot maker
72 Holy Trinity Mission Room
74 Davies Miss Rachel, provision dealer
76 Salmon William, beer retailer
... here is Wouldham Street ...
78 Jones John, hair dresser
80 Wright Frederick & Co, shirt manufacturers
... here is Crawford Street ...
82 Clarke Luke, laundry
88 Reid, Davey & Co, brush manufacturers
92 Hunt Edward, fishmonger
 Wouldham Street, 76 Woodstock Street to Crawford Street
5 Callow Pk Milk Co, dairymen
12 Baybrook Wm, shopkeeper
.. here is Stratford Street ...
Bowden Martin & Sons, plumbers etc
 Young Street, 242 Victoria Dock Road
4 Liddle Wm Hy, shopkeeper
35 Tailor Mrs John, shopkeeper
37 Taylor John, blacksmith