The London Underground has over 1.2 billion passengers annually, making the numerous advertising spaces available very desireable. Unlike buses and overground trains, the tube doesn’t allow access to the internet, leaving many passengers with nothing to look at except ads.

London poster print company Ro-Am Posters says that the essence of a great poster campaign lies in ‘communicating to audiences through eye-catching visuals and succinctly presented information’. A bigger advert doesn’t need you to include more information, in fact less can be more striking and will grab the attention of passengers.

As with any advertorial campaign, budget plays a huge part in where you can advertise.…