Last time I was in Manchester the Primark there was having some refurbishments done and so additional customer stairs were opened. The staircase was horrifically dated - green tiles, blue handrails, horrible lino floors. I'm not sure what the department store was before it was a Primark - probably a Littlewoods or something - but I felt like I'd stepped back in time. There were lots of original features up the walls too such as lightboxes for advertisements.
It used to be Lewis' department store (not to be confused with John Lewis). It was still thriving when I first moved to Manchester in 1986, but died through the 1990s and closed in 2001.
From 1996, other retailers shared the space (e.g. M&S after the Manchester bomb, and TKMaxx in the basement). TKMaxx stayed there for several years after Primark moved into the Ground and First floors.
(
http://en.wikipedia.org/wiki/Lewis's)
Similarly the BHS in Manchester - which was still open - is a living department store museum and well worth a visit to the top floor with its horrific layout, frankly odd architectural features and hidden cafe at the back of the store. They even had those sinister "randomly spinning" CCTV camera "bots" on the ceiling.
That BHS is a disgrace. They have barely touched it since the 1990s. Worse still, because the company has a long-term lease on that corner of the Manchester Arndale, they've thwarted all efforts to do up that part of the building, even though the rest of the centre has been rebuilt, redeveloped and/or reclad since the bomb.