A man was repeatedly punched in the head following a rush-hour argument on the platform of a Merseyrail station .
It happened at Orrell Park station at around 5.30pm on Thursday, July 18.
British Transport Police (BTP) said the victim and another man had departed a train at the station and were heading towards the exit.
A heated argument broke out between the two men and the victim was punched several times to his head.
He suffered a cut to the left hand side of his face and eyebrow, requiring hospital treatment.
The suspect left the station in the direction of Orrell Lane.
Officers believe the man shown in the CCTV images may have information which could help them investigate. If you know who he is, contact BTP by sending a text to 61016 or by calling 0800 40 50 40 quoting reference 1900062067.
Or call Crimestoppers anonymously on 0800 555 111.