That is a teaser, Phil. First thoughts were that it would be the Big Top, but that late-1940s Midland Red bus has a lot of dents along the nearside roof domes, which I would have thought dated it to the late 50s at the earliest.
That kiosk looks familiar, but how about the three old-fashioned telephone kiosks (nobody there needed a mobile, did they?)? I would guess the picture was taken after older properties were demolished, to clear a site for the wholesale markets.
I left Brum in March 1959, so I didn't see much of subsequent changes, although I was always interested (and usually horrified).
So my guess is somewhere round Sherlock Street.
The suspense is awesome.
Peter