The last time Sweden’s GöteborgsOperans Danskompani performed at Sadler’s Wells, in Sidi Larbi Cherkaoui’s Icon, they had three and a half tonnes of clay on stage with them, so this bold, cool and accomplished company are not afraid of a statement prop. This time it’s a dancefloor inclined at 34 degrees in Damien Jalet’s Skid. That’s a pretty steep slope, with graceful scuff marks on its white surface like fissures in a sheet of ice. A body emerges over the top and cedes to gravity, very slowly sliding, through a thick, swelling wall of sound by experimental electronic artist Christian Fennesz and Japanese composer Marihiko Hara.