Originally Posted by Catmittens:
“I don't believe that the factory and bistro are housed in the exterior sets. The factory was indeed filmed in the exterior set during the Baldwin years, but I believe they stopped doing that around the time the Connors took over, and the set was expanded a hell of a lot.”
the factory set was originally filmed in but apparently was a bugger to heat so the moved to an interior set
sets used on the current outdoor lot are the garage butchers as was, kerbab shop, chip shop, health centre, bookies, police station when used and if you want to be very pedantic the smoking shelter (which really is a smoking shelter for cast and crew during breaks)
over on eastenders the public toilets are real to save cast and crew having to go off into the main buildings during outdoor filming