The spy who came in from the cold

Working in London this week, and we pass by this building on the way to work. Unlabelled - but with high security entrances, I bet you know what it is.
Also featured in at least one James Bond film. I took various photos - rather secretively, just in case a cold hand descended on my shoulder and I was frogmarched into a hidden room, and this was the best.

Lots of radio dishes on the roof - can't imagine what they're used for, but they probably have me on film now!








So - if you don't know what it is - its the MI6 building.