Detectives investigating a sexual assault on board an Elizabeth Line train have released this image in connection.
At around 12.40pm on Wednesday 8 July, a 16-year-old boarded a bus towards Abbey Wood Underground station and a man followed her on.
The girl noticed the man looking at her throughout the journey, and he followed her off the bus and onto a train at Abbey Wood towards Tottenham Court Road.
Once at Tottenham Court Road, the girl left the train and was again followed by the man who approached her before sexually assaulting her and walking off.
Detectives would like to speak to the man pictured, as they believe he may have information which 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 119 of 9 July.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
