POLICE have appealed to the public to identify this man as it is thought he may know vital information about a serious assault in Barnsley.
Extensive enquiries have already been carried out into the incident, which occurred at West Green Working Men's Club in Burton Avenue, Monk Bretton, at around 11.30pm on December 29 last year.
A 44-year-old man had to undergo reconstructive surgery after he suffered serious facial injuries when he was punched in the foyer of the club.
Officers are now seeking to trace the man in the red cap, pictured in the CCTV image.
He, or anyone who knows him, should call South Yorkshire Police on 101, quoting incident number 44 of December 30, 2013.
Alternatively, call Crimestoppers, anonymously, on 0800 555 111.