Police investigating an assault in Hitchin have released an image of a man they'd like to speak to as part of their enquiries.
It happened in The Arcade at around 1.45am on Saturday, December 15.
Two men became involved in an argument before one punched the other in the face, causing the victim to fall to the ground. The offender then left the area.
The victim, in his 30s, suffered a broken leg as a result of the assault.