Mark Wallinger, one of the UK’s leading contemporary artists, created a major new artwork for London Underground to celebrate its 150th anniversary in 2013. The result, commissioned by Art on the Underground, is a multi-part work on a huge scale that is installed in every one of the Tube’s 270 stations. Wallinger sees the commission as a unique opportunity to explore the potential of the Underground as a whole. Wishing to forge a poetic link with the Tube’s rich history of graphic language, he has made a work that sits comfortably alongside the two of its major design icons, the roundel and Harry Beck’s Tube map, and yet stands out as a new symbol marking the Tube’s 150th year.