BTP officers are today releasing CCTV images following sexually inappropriate comments on board a Metropolitan line train on the London Underground.
The incident happened at 11.51pm on Monday 14 January between Aldgate and Finchley Road.
A man is reported to have made sexually charged comments towards a woman.
Officers believe the man shown in the images may have information that could help their ongoing investigation.
Anyone who recognises the man, or who has more information about the incident, is asked to contact BTP by texting 61016 or calling 0800 40 50 40, quoting reference number 99 of 15/01/19.