Police are appealing for witnesses to an unprovoked assault which occurred outside the British pub on Saturday night, just before midnight.
The victim was stood near the pub on Douglas quay when he was approached by a group of males and punched on the side of his head.
One of the males responsible is described as being around 18 years of age, wearing a black t-shirt and dark coloured tracksuit bottoms.
The group then ran off before police officers arrived.
PC Dave Kneen is investigating the matter and anyone with information should contact Lord Street Police Station on 631212.