'A very unusual dull thud, then there was silence'

Chris Matthison was near to the crash site.

I heard a very unusual dull thud, then there was silence. The silence really took my imagination. Emergency services responded very quickly.

There was some damage to the crane. It's possible the crane is lying across Nine Elms road. The top of the nearest building is steeped in mist and difficult to see.

– Chris Matthison

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Helicopter crash: Eyewitnesses

The helicopter crashed in central London at one of the busiest times times of the day.