Yes, I see what you mean.
Good to finally know where that isolation guard character fits into it all, too.
From what I can tell, they seem to keep Silva in the same room that Bond’s word association session takes place in.
I keep seeing it referred to as ‘Mallory's isolation chamber’ and the bit on the other side of the glass as ‘Mallory’s observation chamber”.
Perhaps Mallory is responsible for this whole underground emergency HQ for MI6.
M and co have only set up base there because of the explosion at their regular base.
Now it would be one thing for Silva to be confident that he could get out of the isolation chamber when the time was right, but the whole underground bunker?
There has to be a secret way out and he knows all about it. All this keeps taking me back to suspecting that Mallory must be in league with Silva.