A man exposed himself in front of a number of people, including a 12-year-old girl, on the afternoon of the 9th of September.
Officers have released an image of a man they want to question in connection with the alleged incident.
Anyone who recognises him is asked to text BTP on 61016, or call 0800 40 50 40, using the reference 487 of 9 September.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
