Wow, what an absolutely top day out that was! Without wanting to repeat what everyone else has said too much; big, big thanks and massive props to the organizers of this awesome bike ride. This surely has to be up there as one of London's premier annual bike events now, doesn't it?
I made a little time lapse film from atop my penny farthing handlebars which you may want to see. It's on my blog at www.velopoly.com where I've written a bit more about all the fun I had yesterday.