The incident happened at around 3am yesterday (25/4) in St Mary’s Butts, Reading town centre.
The victim, a 53-year-old man, got into a verbal altercation with an unknown man inside PFC chicken shop in St Mary’s Butts. The victim then left the shop and walked away.
The other man then left the shop and ran up behind the victim, assaulting him and causing him to fall to the floor unconscious.
The victim received serious head injuries and was taken to the Royal Berkshire Hospital, where he remains.
Investigating officer, Detective Constable Nathan Lampard, from Force CID Reading, said: “We are appealing to the man in this CCTV image or anyone who knows or recognises him to contact police because we believe he may have vital information about the incident.
“This was a serious act of violence against a victim who was walking away and defenceless. There were a large amount of people present on St Mary’s Butts at the time of the offence so we are appealing to anyone with any information to please contact police.”
If you have any information relating to this case, please call 101 quoting reference '43170118375', or contact Crimestoppers anonymously.