The following items are from Kellys directories. The dates are publication dates and would probably refer to the year before:
1946-1950
Usher C. R. Ltd. drapers 427, & house furnishers 429 & 431, Bordesley grn 9. Victoria 1476
Usher Jn. curator, 36 Cannon st 2. Midland 6272
The drapers are listed before 1946. also. No idea what this John Usher was curating