I like the light on most of these (though I agree with the comments made about the tower bridge shot). What I don't like as much are the angles. There's almost no straight vertical anywhere. For example, in the first shot, the edge of the multi-colored building that is closest to the camera should be perfectly vertical; that way, it would not look off that the other verticals aren't. This way, it looks like the building is tipping over. Don't get me wrong, I wouldn't expect ALL verticals to be straight in that particular shot, but in my opinion, the frontmost one should be. On the tower bridge, they could easily all be straight. The only picture in the collection where the leaning verticals actually add to the image is the last one. To summarize, while I very much like the light in most of these, I think the composition is a bit sloppy.
Daniel