Police are hunting a flasher who exposed himself on a train station platform.
A man exposed himself at Worcester Park station at about 7pm on Saturday, March 15.
British Transport Police have released images of a man they would like to speak to as they believe he may have key information about what took place.
PC Bradley Caine, said: "A woman was at the station with two friends looking at an information board.
"She heard a shout and turned around to see a man exposing himself, and shouting."
PC Caine added: "This was a very intimidating experience for the victim.
"We do not tolerate unwanted sexual behaviour on the rail network and we will take all reports seriously.
"I would urge anyone who recognises the man pictured to come forward and speak to officers investigating the incident."
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or by text 61016, quoting background SSUB/B15 of 02/04/14. Information can also be passed to the independent charity Crimestoppers, anonymously, on 0800 555 111.
The appeal comes as part of Project Guardian - a multi agency initiative involving BTP, Metropolitan Police Safer Transport Command, City of London Police and Transport for London.
The partners have been working together to improve the levels of reporting among victims of sexual offences and to create an environment on the transport network which does not tolerate intimidation and sexual harassment.