At just after 4pm on Sunday 30 January, the victim was travelling home from Derby having watched a football fixture in the city and got off a service at Burton-on-Trent.
A man got off the same service and assaulted the victim in an unprovoked attack.
As a result of the incident, the victim suffered two fractures to his jaw.
The man then boarded a train heading to Birmingham.
If you recognise him, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 321 of 30/01/22.
Alternatively, call Crimestoppers anonymously on 0800 555 111.
