I do know that, I was responding to you saying they covered the unrealistic deserted streets by telling Londoners to stay inside (I used to live in Kensington btw, about a 1/2 mile away from the Natural History Museum, so I know that area all too well).
And like I said I can live with that lack of realism (I've seen worse in stuff I love all the time, be it Dr Who, any given CBM, horror/action flicks etc). That was just a niggle that on it's own was an 'ok then...move on' thing for me. It was the overall story I just didn't care for (so even if they had put extras in running about it wouldn't have been any better for me).