Southbank Centre present Richard Alston Dance Company and National Dance Company of Wales in this one off double bill featuring contemporary dance to live accompaniment.

Richard Alston Dance Company perform brand new work Unfinished Business, to a rarely heard Mozart piece - two beautiful movements of an unfinished Mozart Piano Sonata (Op.K533).

Mozart composed his K.533 late in his short life, only four years before he died. It comprises of two sublime and profoundly beautiful movements - an Allegro which flows in an unending lyrical stream and a starker, more troubled Andante - dark, brooding, questioning.

Movement and music are fused into a unique and profound synthesis in the work by Richard Alston Dance Company.

National Dance Company of Wales perform esteemed American choreographer Stephen Petronio's By Singing Light. The work uses the poetry of Dylan Thomas, whose graceful and powerful words portray a rich human passion that is sharply spiked with Thomas' personal doubts and insecurities as an artist. Composer Son Lux used Dylan Thomas' poems In My Craft or Sullen Art and an extract from Lament together with Mansel Thomas' mixed choir arrangements of Welsh folksongs, Ar lan y môr and Pe cawn i hon to create the score. These provide a harmonic backbone for the music.

Sung live by the BBC National Chorus of Wales the music is set against Petronio's classic dance language.