This is the original artwork for one of London Underground's most popular publicity posters. It was commissioned in 1987 as part of 'Art on The Underground', a campaign set up the previous year to re-establish the London Transport poster tradition. The artist, David Booth of the agency Fine White line, has created a witty adaptation of Harry Beck's diagrammatic Underground map, first published in 1933. Each of the underground lines is represented by paint squeezed directly from a tube. At Pimlico, on the Victoria line, a paint tube stands in place of the Tate. This reinforces the sculptural quality of map and plays on the idea of travelling by 'Tube'.