Police are appealing for information about a man who pushed another man into a train - in an apparent row over football.
The incident took place at Westcombe Park in Orpington, South-East London, on November 13.
The victim, a 27-year-old man, was approached by another man who seemed to think the victim was a West Ham fan, according to police.
The man pushed the victim against a train, causing him to fall down between the platform and the train. He then violently kicked him.
The victim’s girlfriend pulled the offender away from the victim and was also assaulted by him. She did not sustain any injuries.
The victim then managed to climb back onto the platform and defend himself. He sustained concussion and minor injuries but did not require hospital treatment.
Officers would like to speak to the man shown in a CCTV image which can be seen here, as he may have information which could help the investigation.
If you know him, please call BTP on 0800 40 50 40 or text 61016, quoting reference number 119 of 13 November.