Outdoor stages used to arrive as a problem pile: decking, truss, roof, ballast and a small army. Stageline folded the whole argument into a road-legal trailer - and built a global business selling back the hours before showtime.
From Las Vegas warehouses to West End stages, 4Wall grew by buying its rivals and renting the live-event industry the one thing it can't tour without - equipment that works the moment the show starts.