el reassured.18 million pocket maps bearing her design, which depicts a chirping bird sitting on a 'branch' of the Northern Line, will be thrust into the hands of confused visitors when the games kick off in June.She is the 16th artist to be featured on the maps, following artists such as Michael Landy, Yayoi Kusama, Jeremy Deller and David Shrigley.Tamsin Dillon, Head of Art on the Underground sa