A new Tony Cragg sculpture from his current solo show at the Lisson Gallery. They have no title or media info on the site though it's some sort of wood. Its quite an unusual piece for him. I can't think of any other cube-like forms of his since his early stack pieces from the 70s.
Update: The gallery have added the following info about the piece:
WT (cube), 2008,wood, 123 x 120 x 114cm
Their site also has another image of the work from a different angle.