I know. They used the tunnel because it was closed for maintenance for a few days. I'm still annoyed they got the buses wrong...
Those are the buses they used in the movie.
That's the X80 to Bluewater... It's not a bus owned by London, so it's not red!
That's the real 96 bus (doesn't go through the tunnel at all! It runs from Woolwich to Bluewater).