A police spokesman said Sam Woodhead was a little sunburned when he was found, but was hydrated and otherwise well. His family has been notified.
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The victim was hit as she crossed the road at a pedestrian crossing in Tulse Hill.
The rate of Consumer Prices Index inflation rose to 3.1 per cent in November, from 3 per cent in October.
Mr Lewis was accused of squeezing a woman's bottom while giving her a hug at an event at the Labour annual conference.