This performance of Iphigenie auf Tauris is the first time Pina Bausch’s company, Tanztheater Wuppertal, has appeared at Sadler’s Wells since her death in 2009 and in the world of modern dance it is the hottest ticket in town. Based on Christoph Willibald Gluck’s opera of the Greek myth Iphigenie auf Tauris was one of the first works she created for her company in the early seventies.