Just to clarify, the photo was taken from concourse level. You can see the escalators on the left. These were briefly in use taking people between the concourse and the Pallasades levels. Once you got up to Pallasades, you had that circuitous route to reach the shops themselves. That route was closed and diverted to the "eye" in the north west corner.
The closest set of escalators on the left was the one just opposite the M&S Food. At the back of the picture is a greenish wall. On the other side of that is the passage through to the escalators and the "ticket barrier" (I put that in quotes as I've personally never been asked for a ticket there). This is the one you pass through if you enter the station through the current main entrance on Stephenson Street, walk down the ramp, and turn left opposite Boots instead of right.
