Officers were called to the public footpath between Kingston Road and the station car park on Thursday 26 June shortly before 2.30pm.
The victim had been walking home when he was attacked by three male suspects, causing his eyebrow to bleed, and injuring his nose.
The suspects are described as White, male and aged around 20. One had black hair, one blonde and the other was wearing a cap.
If you know who these man are or have any information you should contact police on 101, or crimestoppers to remain anonymous.