On July 26, a woman was travelling on a tram replacement bus service near Waddon Marsh around 11.30am.
As the woman was preparing to leave the bus, she was sexually assaulted by a man.
Today (September 15), the British Transport Police have released an image of man they believe may have information to help with their investigation.
If anyone recognises the man, they have been asked to contact the BTP by texting 61016 or by calling 0800405040, quoting reference 249 of 26 July.
Anyone who wishes to report anonymously can contact Crimestoppers on 0800555111.
