Police have released an image of a man who officers want to speak to in connection with a string of alleged sex assaults on buses.
She said she was sexually assaulted by a man who sat down next to her, at around 6.30pm on Wednesday September 14.
He is described as a 35-year-old Asian man who is around 6ft 1in tall.
This incident has been linked to two subsequent allegations reported to police.
On two separate occasions, another female aged 23 reported she had been sexually assaulted by a man who sat beside her at the back of the same bus route.
Both these incidents happened in mid-July after the victim boarded the bus in Richmond.
Anyone with information about the man in the photo, or about any other incidents, is asked to contact Detective Constable Teresa Moore, at the Roads and Transport Policing Command, via 101.
To give information anonymously, call Crimestoppers on 0800 555 111.