A cycling flasher exposed himself in the morning on Bank Holiday Monday.
Epsom and Ewell safer neighbourhood policing team said a young man was seen acting suspiciously in the vicinity of Green Lanes and Highfield Drive at 8.30am.
The team posted on Facebook: "The male concerned was seen squatting down with a bike. When the witness got nearer the male stood up exposing himself to the witness.
"The male then cycled off towards the wooden bridge in the direction of Ewell."
Police said the slim white man, just over 6ft, was in his late teens or early 20s.
He was wearing a black rain mac, a black rucksack and Nike shorts and had his hood up at the time.
Anyone with information should call 101, quoting reference number 45140071405.
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