We are appealing for information following a public order offence on board a Virgin East Coast train travelling from London Kings Cross to Leeds.
The incident occurred around 10pm on Saturday, 21 April.
The victim, a 27-year-old woman, was on board the train service with her mother when a large group of Manchester United fans joined the service returning from the FA Cup semi-final against Tottenham Hotspur.
The victim, wearing a Chelsea top, received verbal abuse while walking to the toilet on board.
The victim and her mother continued to receive verbal abuse from the group for the duration of their journey.
Officers would like to speak with the man shown in the CCTV images as he may have information which could help with the investigation.
If you recognise him, or have any information which could help, call British Transport Police on 0800 40 50 40 or text 61016 quoting ref: 276 of 22 April.