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.
More top news
It's all going on tonight - as belt of rain sweeps from in from the west - lively downpours will mean rumbles of thunder and hail
A baby boy, born yesterday into a disaster zone, has not yet been given a name as his family and his village wait for help.
Many survivors of the Nepal earthquake still desperately await basic practical help and the shadow of a health crisis looms large.