A 22-year-old man was left needing hospital treatment after he was assaulted by three men wearing bandanas over their faces at Bookham station.
British Transport Police are appealing for information after the attack in the station car park at 11pm on Saturday April 13.
The victim's wallet was also stolen in the incident.
Detective Constable Rachel Smith, leading the investigation, said: "The victim was standing by his vehicle in the car park with some friends when he was approached by three men...
