Ah right! So the space was being used. Reading it back this was when That Puppet Gameshow was made there. It was like a homecoming for The Muppets being in that studio as it was famously theirs at ATV.
You Rang M'Lord, first series of Going for Gold, Allo allo from Series 5 onward, first series of Big Break. Ghostwatch (Halloween 1992) and then from 1994 to 2001 Eastenders used it when they started to produce three episodes a week.
All these years later, I never knew Ghostwatch was filmed there. You can see why it was popular for entertainment. The fixed audience seating tops out at 320. Always think for studios of that size that the audience should be larger without the aid of adding floor seating by the stage.
Yes, many people thought Ghostwatch was made at Television Centre, but the production team needed a full week to record the studio scenes of the "live" show, and so used Elstree as their studio, gave them more space and freedom, without other productions having a peak into the studio to see what was going on.