Sometimes, like when I read posts like this, I just know I was born ten years too late
That shop had definitely gone by the mid-80s when I was strolling around Camden on a regular basis looking for obscure rock, best characterised as Indie I guess. The very first stirrings of Jazz interest at the time took me to a couple of market stalls and the shop on the bridge which had Jazz down the spiral staircase and whose name completely escapes me (possibly to do the the effects of other recreational activity at the time).
Looking agan at that photo I wonder whether its's the same shop under an earlier guise