Great way to see main sites!

Our family really enjoyed this guided, narrated tour of the main sites in London (Thames River, Parliament, Westminster Abbey, Buckingham Palace, St. Paul's). We saw places that we may not have ventured to ourselves. Mostly, we were on dedicated bike paths. However, there were a few street crossings that we felt were dangerous - we didn't cross at a cross walk or lights, so navigating a group of 12 or so cyclists across traffic that comes in the opposite direction to our country, was very hectic and scary. I am not sure why our guide didn't take us a short ways to cross at lights. We also only had a 10 min. break to get food/toilet break and when time was up, he promptly left the park, assuming that all of us were following, and just left before checking. Overall, we were happy with the day, but realized that some of the street crossings were just plain dangerous.