Kings Place, 2005-8, by the architectural practice Dixon Jones. In York Way near King's Cross station.   A mixed-use building with public concert hall, arts venue, conferences, bars and restaurant and commercial office space. The Guardian newspaper is moving here in 2008. 

The front is west-facing and has an undulating glass facade. This is a free-standing transparent surface made up of hundreds of very slightly curved sheets of glass, produced in Italy near Venice. As can be seen in these pictures, it gives a hall-of-mirrors effect to the cloudscape.

Dixon Jones Website