Is that BIG BEN waaaaaaaaaaaay in the background? ;) Having never been to London and not having a clue which is which besided Big Ben the shot itself is very compelling. The jagged horizon from the different buildings has you looking all over the picture trying to capture the small details. The shadow on the lower left is a bit distracting to m but I'm guessing you wanted the church {?} on the left included in the shot. And if you didn't have the buildings on the right to balance the shot it would have really left me wanting.
I love the brilliant blue sky. It looks like the same kind of day I am having today here in Wisconsin (USA). Fabulous capture of the landmarks. Excellent photo!
Ah quaint old London. Good idea to get as many landmarks in in the photo as possible. I recognise a number of buildings plus the wheel on the Thames way out the back. This is like one of those puzzle pics: "How many buildings can you name" :-)
I really have a thing for rooftops, and these are famous rooftops. The sunlight is distracting- try taking this same shot on a foggy, day, make it black and white, and you have a 9 or 10.