Detectives investigating a sexual assault on board a train from Rhyl to Manchester Airport have released these CCTV images in connection.
At around 1.45 pm on Saturday, 11 October, a man proceeded to stare at a woman on board.
As the woman went to leave the service at Manchester Piccadilly, he had approached her before sexually assaulting her.
The man left the train at Manchester Oxford Road.
Detectives believe the man in these CCTV images may have information that could help with their investigation.
Anyone who recognises him is asked to contact BTP by texting 61016, or by calling 0800 40 50 40, quoting reference 2500126159.
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.