Search the historical London street directory and pub history site by surname, street or pub name; you will find many obscure early street addresses in London through the Victorian pub history of London and early parish and licensing records on this site. Most records are before 1944 plus some modern detail, and lots of pictures.
London Street Listings Index in 1921.
(South side & North side to Paradise Place in Finsbury, remainder in Shoreditch)
... here are Paradise Place & Whitfield Street ...
17 & 18 Lowthime D A & Co, album manufacturers
17 & 18 Hunt Thomas John Ltd, account book manufacturers
17 & 18 Lowthime D A & Co, album manufacturersBarnes Osmond, who stationer
1 to 8 Bell Punch & Printing Co Ltd