Foster Glass Canopy just completed in Washington, DC (pic from the world architect news online):
http://www.worldarchitecturenews.com...sonian%202.jpg
Apparently this is similar to another one he designed for London. I haven't seen the one in London but the one in DC is incredible. And that is a large building with a very large courtyard (hard to get a sense of scale in the photo). This one is metal and glass but imagine the shape in the sketch with wood and glass. I think it would be really impressive and open up the courtyard magnificently.
Another plus of the canopy is that it can be uplit from below at night for some incredible effects and the glass atrium appears to glow at night so from a distance it has a very impressive appeal.
Anyway, I think it is a cool design and I hope it does come together as part of the renovations of the Robson square.