The Mayor's Thames Festival September 9, 2011

The Mayor’s Thames Festival is London’s largest outdoor arts festival - a spectacular event, free to all, which brings together Londoners of all ages and from all communities to celebrate their city and the River Thames.
The Thames Festival celebrates London and the iconic river at its heart – the Thames – by dancing in the streets, feasting on bridges, racing on the river and playing at the water’s edge.
Come on down to the river and have a fantastic weekend!

Official Website: http://www.thamesfestival.org/