This sign on this branch was certainly painted in the 1920s.
Below are pictures of the parts between the second and first floor windows.
(*): the name was shortened to Booker plc in 1986. In 2000 Booker plc was bought by the Iceland Group and merged into the Big Food Group. However in 2005 the group was taken private by the Icelandic company Baugur, which then split them into different companies before returning Booker to the stock market in 2007 through a reverse takeover of the convenience store wholesaler Blueheath Holdings. Baugur sold its remaining assets into Booker Group plc a few months before going bankrupt in 2009.
Location: Harrow Road / Pictures taken on: 17/08/2009