The photo below of WE Jones shop in Ivy Street Rainham selling Woodhams Ales and Stouts was taken in 1912. You can also see in the windows that they are a grocery stores selling Fry's Pure Cocoa and Cadburys Cocoa as well as Hudsons Soap and Bournville Cocoa so no mention of chocolate in those days!
http://www.breweryhistory.com/Defunct/Kent.htm
