Or perhaps he's been brainwashed and is on his way to kill M. He looks rough, tired, possibly drunk - all intentional I'm sure.
In the National gallery? Not likely. I suppose, what ever is haunting M has come and got her. He looks less pissed then very worried, shaken...
The national gallery is right accross from the Admiralty, where M used to be based, and a stone's throw away from Downing Street - so it's within the realms of possibility. But yes, in the context of the plot, he's probably just a bit shaken and stirred about M's betrayals etc. Sigh.
Or perhaps he's been brainwashed and is on his way to kill M. He looks rough, tired, possibly drunk - all intentional I'm sure.
I think the idea that the opening of TMWTGG will be filmed is little more than fan fantasy right now.
Leave my fantasies alone!
Location: M's office in the Admiralty, late at night.
Bond walks in, pulls out his gun [insert your favourte type, I don't really care], looks at M blankly, aims and fires a single shot. Camera shows DD-M slumped in her chair, a single red dot on her forehead. The camera then gets knocked sideways and falls to the floor, as Bond is taken out (shot in the shoulder, or whatever else non-lethal).
A bit too self referential, and Bond focused - but it's worth it for this.