“The name of Arup rings through postwar architecture like a subsonic rumble. This extraordinary firm has had a largely invisible hand in many of the iconic structures of the past 50 years, from the Sydney Opera House through the Pompidou Centre, James Frazer Stirling’s Stuttgart Art Gallery, Norman Foster’s Hong Kong and Shanghai Bank, right up to the Swiss Re Tower and the London Eye. If you’ve got a huge or difficult project to sort out, like a bridge or a skyscraper or an airport, Arup is one of the few companies to turn to.”