It really is a great sight, and BIG, I was over there recently and went up in it, a wonderful experience. You have a great series of images from your half-term trip, I was lucky, it was evening when I went up in the Eye and I got a great sky behind Big Ben when we came down:
http://www.fotothing.com/Petermosull/photo/174581f9f974fed16910c387176f822f/