Police have released this CCTV footage after a man was punched in the face on a late night train as it pulled into Milton Keynes.
The 41-year-old victim was assaulted on the 23.24 service from London Euston as it arrived at Milton Keynes Central at 12.20am on Saturday, November 15.
He had to be treated at hospital for his injuries.
Police have been pursuing several lines of enquiry and hope this footage will help them identify a man they want to speak to.
PC Alex Trivino said: “The victim was travelling in a first class carriage. Throughout the journey, a man and a woman were talking to various other passengers in the carriage. As the train pulled into Milton Keynes, this man assaulted the victim, causing a cut underneath his left eye which required treatment at A&E.
“I am confident that someone will recognise the man shown in these good quality moving images. I want to urgently speak to him about what happened. I would also like to hear from anyone else who was on the train, and saw what happened, and has not yet come forward to police.
All rail passengers rightly expect to be able to travel without the fear of violence or intimidation. We are doing all we can to catch the person responsible
“All rail passengers rightly expect to be able to travel without the fear of violence or intimidation. We are doing all we can to catch the person responsible.”
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference MSUB/B4 of 16/03/2015. Information can also be passed anonymously to independent charity Crimestoppers on 0800 555 111.