London, UK. 01/02/2011. American Ballet Theatre make a return to Sadler's Wells with two programmes of pieces. the mixed bill includes the UK premieres of Alexei Ratmansky's "Seven Sonatas" and "Everything Doesn't Happen at Once" by Benjamin Millepied. Completing programme one is Twyla Tharp's "Known by Heart" pas de deux and George Balanchine's "Duo Concertant", set to music by Igor Stravinsky. Principal Daniil Simkin in the arms of the corps. Picture credit should read: Jane Hobson