Detectives have appealed for information after a man from Southwark was attacked on board a train from Feltham to London Waterloo.
British Transport Police detectives have released CCTV footage of a man they want to identify and talk to in connection with the incident, which took place around 6.15pm on Monday 31 January on board the 6.16pm Feltham to Waterloo South West Trains service.
"The victim, a 38-year-old from Southwark, had boarded the train at Feltham before approaching a man and politely asking him to remove his feet from the seats, and in return he was met with a tirade of abuse," says PC Gemma Lee.
"When the victim took a seat in the row behind, the suspect reached over and grabbed the victim's hat, striking him on the head before throwing it into his face.
"As the man continued his angry outburst, the victim left the carriage at Clapham Junction station, re-boarding a few carriages back before telling the guard.
"This was an unprovoked attack and the victim was left very shaken and distressed by what took place.
"As part of our investigation we've conducted a number of enquiries to try and trace the person responsible for this incident, including circulating images on police intelligence systems and speaking with local neighbourhood policing teams, but to no avail so far."
If you recognise the man, contact British Transport Police on 0800 40 50 40 and quote reference B12/LSA of 13/4/11
Information can also be passed to Crimestoppers, anonymously, on 0800 555 111.