"Brum's" BULL RING CENTRE, an urban renewal experiment, was modestly successful for a time. However, by the mid-1980s, it had declined into a derelict, graffiti-covered -and virtually vacant- property. 
Photo from http://kebabselector.myzen.com.uk / "Scphoto"

One of the original features of the centre was its labyrinth of subterranean pedestrian passageways, which were built to separate on-foot traffic from the maze of surface roadways surrounding the complex. These so-called "subways" quickly became notorious for muggings and assaults.

Photo from http://kebabselector.myzen.com.uk / "Scphoto"