Michael Stevenson’s installation Signs & Wonders, 2015–16, has a lot to do with flight, and is now something of a frequent flier itself. Having previously been shown at Kunsthal Charlottenborg, Copenhagen, and Midway Contemporary Art, Minneapolis, it touched down at Carl Freedman’s relatively small London space in June, in a compressed form. Four boxy structures resembling low-tech 1980s-era flight simulators were crammed into the gallery, their front ends parked up against freestanding projection screens showing computer-generated video loops: pilot’s-eye views of flights through banks of cloud