On a related note I was watching French & Saunders series 1 last night on Netflix with my girlfriend. Episode 5 might be of interest to some as it features quite a bit of the old TV Centre.
The pair initially driving outside TVC were 'stopped' at the gate by a commissionaire, so 'climb' over the BP garden wall. When they get to their studio they find the doors chained, so they use to 'Blue Peter' studio next to theirs. There are also shots of the edge of the studio and what I assume is/was the gallery for that studio. (If I recall episode 4 featured a bit by the 'Helios' status, and also a cameo from Michael Grade.)
"Listen, we've all got something to bring to this conversation, but from now on what I think you should bring is silence." - Rimmer