Officers are appealing for information and witnesses after a man exposed himself on board a train from Seaford to London Road railway station.
Between 4.30 pm and 5.10 pm on Wednesday, 1 October, a man was reported to have been exposing himself to passengers while sitting in the train carriage.
He left the train at London Road railway station.
If you recognise this man or have any information about the incident, please get in touch with officers by texting 61016 or calling 0800 40 50 40, quoting reference 488 of 1 October.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
If you or anyone you know has been affected by the individuals highlighted on this website, please report them to the Police on 101 (999 in an emergency) or visit their online resources for further details on reporting a crime. You can also report to Crimestoppers if you wish to remain completely anonymous. There is help available on our support links page.