A flasher exposed himself to a group of people at a bus stop in Bermondsey during the morning rush hour, police say.
The man allegedly flashed at commuters waiting at the stop on Old Kent Road at about 8.15am on Friday, October 14.
Shocked bystanders are said to have attempted to hold him while waiting for officers to arrive but police say he managed to escape and run off.
Now police have released a picture of a man they would like to speak with in connection to the incident.
The man is described as clean-shaven, white, aged between 35 and 40, 5ft 6in tall, with short black hair.
He was wearing a black jacket, jeans and black shoes at the time of the alleged incident.
A Scotland Yard spokesman said: “The incident happened at approximately 8.15am on Friday, October 14, at a bus stop in Old Kent Road, near Mina Road.
“Officers from the roads and transport policing command are investigating.”
Anyone with information is asked to contact local police on 101. Alternatively, call Crimestoppers anonymously on 0800 555 111.