Sky TV are promoting Skyfall by dedicating the Sky Movie channel on 303 to the previous James Bond films .(Such as Live And Let Die, which is shown in the picture I have taken above.) It has been named Sky Movies 007, and even has a twitter page.
The Skyfall Marketing team are working closely with companies to produce advertising campaigns such as this. As we can see from the poster, Skyfall is in association with Coca Cola and Sony Xperia Smartphones. This also almost creates a type of merchandising for the film as well.
These are two examples of advertising with posters on buses. The bottom picture however is advertising Skyfall on a larger scale, as the poster is all over the entire bus.