You need to listen to The Empty hearse commentary on Mycroft's various offices...the discussion is hilarious!
MARK: And then Arwel [Wyn Jones, the Production Designer] created this fantastic set, deliberately sort of Bond-like. This [location] is also under The Diogenes Club. SUE: Yes, ’cause your offices change quite a lot. STEVEN: Well, he’s got several offices, Mycroft. MARK: The first one we see [in The Great Game], I think is my, you know, my legitimate ... SUE: ... sort of day to day office. STEVEN: This is where he orders executions down here.
arianedevere [x]
(Mr. Gatiss says "also under the Diogenes Club" because they'd just been joking that the Serbian torture chamber was in the Diogenes basement -- because the two sets actually are in the same building.)
this one’s my favourite - with the Queen’s picture as backdrop ...
source: sherlockforum [x]