They believe the assault took place on Sunday morning (8 August) at 00:10 hours.
They are looking for a white male, possibly around 25-30-years-old, between 5’11 and 6ft tall, of stocky/large build with receding short dark hair.
He was wearing a dark green top and similar coloured shorts, as well as dark shoes/trainers with no socks.
His victim was a man in his mid-twenties wearing a navy coat and jeans with an orange sports carrier bag.
The victim initially fell to the floor and was kicked before getting up and being pushed down and kicked again.
He received facial injuries and was kept in hospital overnight for observation and x-rays.
Anyone with any information is asked to contact the police on 612612, Crimestoppers anonymously on 0800 555 111.
They can also contact them through Crimestoppers’ anonymous online form, which you can access by CLICKING HERE.