An urgent appeal for help has gone out after CCTV footage was found of three men suspected of a station attack five months ago.
British Transport Police hope people can help their investigations into the attack on the man on September 24 in Eynsford station car park.
The 20-year-old victim was attacked after getting off the 9.42pm service from Blackfriars.
The three men walked into his carriage between Swanley and Eysnford, then followed him off the train.
"When he got off, he walked past the men who then followed him into the station car park and demanded he handed over his belongings," said DC Devereese.
He gave them his mobile phone, iPod and wallet. They also took his watch.
"Once all the property was handed over he was set upon by the three who kicked and punched him in the face, head and upper body."
The men may have left Eynsford on a 10.45pm service to London.
The violent attack left him with cuts, bruises, and intimidated.
Anyone with information is asked to contact British Transport Police on Freefone 0800 40 50 40 quoting reference B3/LSA of 30/01/13. Alternatively, contact Crimestoppers on 0800 555 111.
Don't miss out, subscribe today. Keep up to date with our newsletters.
A guide for your future. For year 11 students in Kent and Medway. Click here for the e-edition.
Education, Training & Childcare is a special supplement published by KM Media Group four times a year. Click here for latest e-edition.
Get the latest food and drink news, recipes from some of the nation's top chefs plus updates from Kent's vineyards and breweries.
Search in your local area to find your perfect partner in Kent, with FreshStart Dating! PLUS, register for free!.
Find out what's going on in the garden, with Kent expert Lucy Hewett's weekly update.
Buy pictures that you've seen in a KM newspaper, or send in a picture and we will place it on our photo sales website so that you can purchase a super, unique gift.