Hi Mark and welcome to Rootschat!
I guess Cordelle is going to be our best clue and having searched Historical Directories for that word have come up with :
Cordelle, Ellen Mary (Madame), Ladies' Outfitter, 503 Green las (?), Haringay, Middlesex in Kelly's Directory of 1914
Obviously the photo is much later but this might be a clue to the origins of the shop?
Heather