Balham High Road has now reopened, after scaffolding collapsed last night across a pedestrian crossing.
Firefighters were called at 3.20am to remove the 10m by 8m scaffolding tower, which was lying in the road and on the pavement opposite Sainsbury's.
Firemen used an infra-red camera and lights to make sure nobody was trapped underneath.
Maria Bardanca, manager of WHSmith's which was next to the fallen scaffold, said: "It happened in the middle of the night, nobody was hurt.
"They had to cut the power off and it has just come back on now. We had to delay opening by one hour."
The road reopened at 9.45am after severe traffic disruption.
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