Old Fire Station
Technically, the whole building is the Old Fire Station.
After the renovations in 2016-18, the building reopened with a single flexible theatre space, which occupied the old Prompt Corner as well as the technical room and stage left wings of the old Bell Theatre. The new space is usually referred to as the theatre but, to differentiate it in this archive from the original proscenium arch Bell Theatre (which was originally called The Theatre and then the Main Stage), all productions in the new space are indexed in the archive as Old Fire Station Productions.
Hope that's clear!