G20, London 2009 - protest, cheering and helicopters

Recorded by Ian Rawes.

"G20 protests, 2009: Crowd noise increases as the march reaches King William Street, with cheers and something like a cow-bell being struck. The noise redoubles when office workers are spotted peering from windows high up along Lombard Street."

Part of the Protest and Politics project - find out more at http://www.citiesandmemory.com/protest