The Tube train (1992 stock for those who care - train 91063+91055 to be even more specific) entered service, with the switchover message on every door and features windows that form TV screens. All seats on the train have been given pink "moquette" to further support the initiative.
Deborah Bain, London manager for Digital UK, said: "There are now less than three months to prepare for switchover. This is an exciting change affecting millions of viewers and we're doing everything we can to avoid people facing a blank screen."
London Underground rarely have branding where the whole train is taken over. There was some on the Piccadilly Line to promote Platform for Art in 2007. However, the most eyecatching was for 2004's promotion to "Back The Bid" for the 2012 Olympics.
This was when London was only a candidate city, so quite a bit of expense to try to prove we were a city worth giving the Olympics to. Looks like it worked though, even though experience on the Tube during the 2012 Olympics certainly won't be worth an award.