Walk forward a few more steps and all becomes clear: it’s the Channel Four logo. Isn’t that clever.
The piece is by Stephanie Imbeau and there is more about it on her webpage at: http://www.stephanieimbeau.com/
The building is of course the Channel Four headquarters, designed by Richard Rogers and completed in 1994.
“The clients were looking for a scheme which expressed the character of their operations – innovative, socially aware and willing to take risks. The building admirably expresses the perceived identity of the organization while reflecting civic and contextual values which are central to RRP’s urban architecture.”