Yesterday I journeyed to Oxford Street by train and noticed that building, it is very ugly, imo, looks more like a shaver than a walkie-talkie to my eyes. Some buildings in London I like, the Gherkin's ok, Shard too, but others are just plain yuk, like that walkie-talkie thingie.
I suppose they will have to identify the windows causing the problem and perhaps coat them with some anti-glare stuff.
And here's a BBC follow-up feature, it's not a new problem, it seems:
Frying Tonight