A man sexually assaulted a girl in front of her friend on board a train in south London.
Detectives on Wednesday released a photo of a man they want to speak to in connection with the attack, which happened around 10.15pm on September 16.
The girl was sitting on a train travelling between Wallington and Balham railway stations with her friend, when a man began talking to them.
"He then sexually assaulted her and later exposed himself to her," British Transport Police said in a statement.
"Detectives would like to speak to the man in the image who they believe may have information that could help their investigation."
Anyone who recognises him is asked to contact British Transport Police by texting 61016 or by calling 0800 40 50 40 quoting reference number 744 of 16 September 2023.
