Above, an ad posted by atheists on the underground, to counter the WWJD ads put up by fundamentalists.
The tube leads the way in video ads. One of the most compelling is a ten second version of a longer commercial for T-Mobile, in which a flash mob comes together to do a bunch of line dances on the floor of Liverpool Street tube station. (To see the ad, click here; to see a video about the making of the ad, click here.) The short version is pretty compelling, and when you’re standing on the platform, you can see it dozens of times. I don’t know if someone can become a star on the basis of a mini-commercial shown on a train platform, but my money is on the girl above.