Bus Wraps & Advertising Travel To London

From what I have seen, outdoor advertising can have a tremendous impact on a brand, provided it is done the right way. It should be the case, seeing as how this is the location where people are going to be most likely to stop and turn towards a graphic that can capture their attention. In this case, bus wraps have more than been able to do this in the past. That being said, how has this level of advertising been done in order to advertise travel to London?

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