Ever built a cantilevered hyperbolic paraboloid superstructure?

How would you fancy building a cantilevered hyperbolic paraboloid superstructure in an internal courtyard in one of the most high profile Grade 1 listed buildings in the UK? Oh and it is 90 metres away from any road access, and 30 metres down inside the building, with only 5 metres of clearance on each side!

That's exactly what the team at Gilbert-Ash Fit Out achieved at the Foreign, Commonwealth & Development Office in Whitehall. Find out more about how they did it in this short video.