Police have released a CCTV image of a man they wish to speak to in connection with an assault at Ruislip Manor Underground station.
Officers are investigating an incident that occurred on a Metropolitan Line service at around 3pm on Saturday, 14 March.
A victim had his bag taken by a man, who then became violent when confronted. The suspect dragged the victim off the train at Ruislip Manor station and repeatedly hit him in the head and face, leaving him with facial injuries.
The police believe the man in the released image may have information that could aid their investigation.
They are urging anyone who recognises him to come forward and contact the British Transport Police by texting 61016 or calling 0800 40 50 40, quoting reference 420 of 14 March.
Alternatively, information can be provided anonymously to Crimestoppers on 0800 555 111.
