The most notable thing is the lack of helmets. 90% of the cyclists I've seen are not wearing a helmet. Watching them from the upper deck of a bus, I felt sure we were going to witness a collision with the cyclists crushed under the London transit bus' wheels.
|On Tower Bridge
The Barclays rental bikes are very popular and it appears to me that most of the people riding them are not tourists but citizens of this monstrous city. I came across a poster that claims that in the first three months of operation, there were 1.5 million uses of these bikes. That is a lot of trips!
In the next day or so, I plan to rent one myself and if it is allowed, I'd like to ride one along the Thames.