The structures are used for musical events, and throughout the period on Clapham Common, various musical events take place with the finale on Sunday 20 September being a new work by composer Alexander Campkin. Imagined Cities is a one-hour immersive theatre piece, a thought provoking reflection on the explorations of Venetian traveller Marco Polo in the thirteenth century. Directed by Jacek Ludwig Scarso and conducted by Dominic Peckham, it features The Fourth Choir alongside electroacoustic music and live musicians. All performers will have the freedom to interact with members of the public as they wander in the structure. Further details from the Colourscape Festival website.