I took the Nighttime tour of the South Bank of London during a business trip. The tour guide was very good. I am currently attending the Rhode Island School of Design for Photography and the guide's breakdown and explanation on ISO, Aperture and Shutter Speed was more concise and easier to understand than all of the never ending technical diatribes that I've paid thousands of dollars to hear in class from some of the world's foremost photograpers! My wife, who happened to tag along as a non-photographer walked away understanding it! "That's easy," she exclaimed! There were all different levels of skills in the group and the guide moved around ensuring that everyone was all set. She primarily focused her instructions on those that were newer or inexperienced with night photography but she still checked in and offered hints and tips to those of us with more experience. You won't see a ton of sites, but this is not that type of tour. It's designed for those that want to take long exposure photos of the scenic South Bank of the Thames River at night. I'll definitely be checking them out again the next time I'm back in London.