London has a new way to get around town...Boris Bikes. At the end of July, 2010, Mayor Boris Johnson debuted Barclay's Cycle Hire. This is similar to the Paris VelLib program. The London bikes are Rolls Royce quality, a basket on the front to carry packages, and guards around the chain to prevent pants' legs getting entangled. The first 30 minutes are free and a nominal charge for the useage time thereafter.
This is a fantastic way to get around London quickly, take in the sites and stay out of the dreaded auto traffic.
This video is a How to Use the bike system.