Pond Street bus station and the famous kiosk that everyone knows and loves!
Here are some photos of the shops on the Flat Street (Levels)
https://picturesheffield.com/frontend.php?keywords=Ref_No_increment;EQUALS;s23933&pos=78&action=zoom&id=26386
https://picturesheffield.com/frontend.php?keywords=Ref_No_increment;EQUALS;t08596&pos=11&action=zoom&id=124682
I remember the arcade, the bakery, Minerva and the Fads DIY store... Presto must be out of shot?