The Liverpool Biennial opens to the public this week, and is celebrating twenty years of ambitious commissions throughout the city. This looming space-age structure is the starting point for Ryan Gander’s new installation work Time Moves Quickly, created in collaboration with five young artists from Knotty Ash primary school. Gander has dissected the Frederick Gibberd-designed brutalist Liverpool Metropolitan Cathedral into “building blocks”, which have then been reorganized by the children and enlarged to create public seating that encourages biennial-goers to sit back, relax and dream of sacred architecture.