Outside the Southbank Centre stands Jeppe Hein’s interactive exhibition. His appearing rooms are created from jets of water that shoot into the air, leaving spaces between. Step up and participate in this technologically driven project. First seen in the garden at Villa Manin, Italy, it’s become something of a permanent fixture during the summer on the South Bank. This event is free and entry is on a first come first served basis, so it can't be guaranteed. There are no tickets to collect. Just enter the venue.