I used to go there, probably later than most posting on here - around 1989 onwards. There was Piccadilly Records on the left where you could buy also gig tickets, and Top Rock Shop opposite where I used to buy Directions hair dye. I remember a good record stall in the underground bit and another stall where you got the ubiquitous stripey tights from, and another unit down there which sold punk stuff where i remember buying a pvc mini skirt. It was part of my usual rounds on a shopping trip along with the Corn Exchange, Afflecks, Eastern Bloc.