Art Below:

For the fifth year running Art Below thrive on providing artists with access to advertising space in the London Underground where nearly 2 million people travel every day.
Our mission: To enrich the everyday life of the travelling public by giving fresh insight into the very latest in art, illustration, photography, fashion, whilst at the same time providing a platform for emerging talent.

"Directional art with an unorthodox backdrop lends Art Below its fresh, original edge that's currently causing a creative awakening amongst commuters" THE GUARDIAN