You would think someone would realize that concave reflective windows on the sun facing side of a skyscraper might have something along this effect. Though (and this isn't my joke) they probably didn't think the sun would shine in England for the effect to be strong enough.
*ba dum sssss*
Death ray aside, I actually kinda of like the oddness of the shape. Really, London's skyline as a whole is developing quite uniquely and more modern than I think people thought possible.