This is a picture I found out on their corporate website. BetFair occupies only parts of this building. (There’s another building similar to this one, on the left, but you don’t see it because it is not in the frame.) Right behind the photograph taking the picture is the river Thames (hosting ducks and cormorants).
As for the sunny sky you see in the photo, this is PhotoShop work, of course. 
[Just kidding. It's a genuine picture.]
Street address of BetFair corporate office (BetFair headquarters):
BetFair
The Waterfront, Hammersmith Embankment
Winslow Road – (Chancellors Road)
London, England
W6 9HP, United Kingdom, European Union
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