Along with our new friends from Iceland, Italy, Ireland and Poland we took to the gentle waters of the Serpentine in Hyde Park aboard the wonderful Solar Shuttle, powered entirely by the sun. Our trip was generously donated by Peter Scott whose company, BlueBird Boats, runs the public boating service.
Here is an article on the design and build of the Solarshuttle http://www.core77.com/reactor/09.06_solarshuttle.asp