The Pavilion by Sanaa, at the Serpentine Gallery@Arch

Kicking off back in 2000 with Zaha Hadid's suitably swooping offering, the Serpentine Gallery Pavilion project (sponsored by NetJets Europe) has, each year since, introduced a specially commissioned pavilion to London's Hyde Park. With Alumnus including Rem Koolhaas and Olafur Eliasson, this year sees the turn of Japanese firm, Sanaa. Here we talk both to the architects, Kazuyo Sejima and Ryue Nishizawa, as well as the Director of the Serpentine gallery, Julia Peyton Jones.