Bond will go to China to finish the film in Scotland? and the epilogue in London again.
There is no evidence of an epilogue set in London. The shots of Craig and Harris on top of the Department of Energy and Climate Change building were numbered 172, which is comparable to Bond's recovery after the torture in CASINO ROYALE - which is really the beginning of the third act. It's more likely that those scenes with the box will take place before the finale.
My guess is that the eight dead are somehow connected, and that the attacks on London are actually a targeted assassination in disguise. The dead are connected to "Skyfall", and the only clue is a Chinese intelligence substation in Shanghai. As Bond investigates to identify the perpetrators, M comes under investigation, cutting Bond off from MI6.
Since Craig was in Berlin at the time, maybe, I know this is a rather big possibility, but I wonder if Bond is taken off the radar, too. You know, staging his own death in order to take him off the grid.
He may have been dispatched on an assignment by this point. Scene 35 is early in the film, but comes well after the titles. We know scene 57 takes place in a grimy bathroom, and something around scene 65-ish is in the underground bunker, but I don't think Craig has been confirmed as taking part in either of these scenes. Reports suggested that Bond would be involved in some kind of chase in London, switching vehicles along the way - but we haven't heard any reports of this actually being filmed. It may well be that the convoy is taking M and key MI6 personnel to the underground bunker, which is actually the morgue where the bodies are being kept. Bond, meanwhile, leaves the party and uses a discreet exit in the building and comes out of the National Gallery (why a morgue is under the Gallery is beyond me, but it may be a part of the bunker, because the reports say the morgue is not in the Painted Hall, but under it), crosses to the Underground station and exits the city quietly to begin his investigation.