A woman was molested after being followed through Waterloo station.
British Transport Police (BTP) have released this image of their suspect.
Investigating officers are appealing to members of the public for their assistance in identifying him.
At approximately 11.30am on Thursday, November 21 the victim was sexually assaulted by an unidentified male, who tracked her through the busy terminus.
Anyone who recognises him is asked to contact BTP by texting 61016 or by calling 0800 40 50 40, quoting reference 327 of 21 November.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.